Chalmers Research: Lennart Löfdahl

2018

Experimental Investigation of the Near Wall Flow Downstream of a Passenger Car Wheel Arch

Sabine Bonitz, D. Wieser, Alexander Broniewicz et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 11 (1)

Artikel i vetenskaplig tidskrift

2018

Aerodynamic Analysis of Cooling Airflow for Different Front-End Designs of a Heavy-Duty Cab-Over-Engine Truck

Helena Martini, Peter Gullberg, Lennart Löfdahl

SAE International Journal of Commercial Vehicles. Vol. 11 (1)

Artikel i vetenskaplig tidskrift

2018

Numerical investigation of crossflow separation on the a-pillar of a passenger car

Sabine Bonitz, Lars Larsson, Lennart Löfdahl et al

Journal of Fluids Engineering, Transactions of the ASME. Vol. 140 (11)

Artikel i vetenskaplig tidskrift

2018

A numerical investigation of thermal engine encapsulation concept for a passenger vehicle and its effect on fuel consumption

Blago Minovski, Jelena Andric, Lennart Löfdahl et al

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

Artikel i vetenskaplig tidskrift

2017

Force Based Measurement Method for Cooling Flow Quantification

Teddy Hobeika, Peter Gullberg, Simone Sebben et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 10 (2), p. 619-627

Artikel i vetenskaplig tidskrift

2017

Experimental and numerical investigations of cooling drag

Teddy Hobeika, Simone Sebben, Lennart Löfdahl

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. Vol. 231 (9 (SI)), p. 1203-1210

Artikel i vetenskaplig tidskrift

2016

Theorie und Grundlagen der Stromlinje – Fahrzeugaerodynamik heute – Wohin geht der weg?, Strom Linien Form - Die Faszination des geringen Widerstands

Lennart Löfdahl

Bok

2016

Investigations of the Rear-End Flow Structures on a Sedan Car

Charlampos Kounenis, Sabine Bonitz, Emil Ljungskog et al

SAE Technical Papers

Paper i proceeding

2016

Vehicle Aerodynamics and Thermal Management in Future Hybrid and Electrical Vehicles

Lennart Löfdahl

Elektrik/Elektronik in Hybrid- undt Elektrofahrzeugen und Energimanagement VII (EEHE), Editors, C. Hoff & O. Sirch, Haus der Technik, Expert Verlag

Paper i proceeding

2016

Qualitative tuft flow visualization on the volvo S60 under realistic driving conditions

D. Wieser, Sabine Bonitz, Christian Nayeri Navid et al

54th AIAA Aerospace Sciences Meeting, 2016, San Diego, United States, 4-8 January 2016

Paper i proceeding

2016

Numerical Investigation of Natural Convection in a Simplified Engine Bay

Blago Minovski, Lennart Löfdahl, Peter Gullberg

SAE Technical Papers (April)

Artikel i vetenskaplig tidskrift

2016

Numerical implementation of Detached Eddy Simulation on a passenger vehicle and some experimental correlation

Lennert Sterken, Simone Sebben, Lennart Löfdahl

Journal of Fluids Engineering, Transactions of the ASME. Vol. 138 (9), p. Art.no. 091105-

Artikel i vetenskaplig tidskrift

2016

Quantitative Tuft Flow Visualization on the Volvo S60 under realistic driving Conditions

D. Wieser, Sabine Bonitz, Ture Jesper Marklund et al

54th AIAA Aerospace Sciences Meeting 2016

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2016

Flow Structure Identification over a Notchback Vehicle

Sabine Bonitz, Lars Larsson, Lennart Löfdahl et al

International Conference on Vehicle Aerodynamics

Paper i proceeding

2016

Wheel housing aerodynamics on heavy trucks

David Söderblom, P. Elofsson, Linus Hjelm et al

Lecture Notes in Applied and Computational Mechanics, p. 211-223

Kapitel i bok

2016

On the Possibilities and Limitations of Wind Noise Testing in the Aerodynamical Wind Tunnel at Volvo Cars

Olga Roditcheva, Lennart Löfdahl, Simone Sebben et al

SAE Technical Papers. Vol. 2016-June (June)

Paper i proceeding

2016

Surface Flow Visualization on a Full-Scale Passenger Car with Quantitative Tuft Image Processing

D. Wieser, Sabine Bonitz, Alexander Broniewicz et al

SAE Technical Papers (April)

Paper i proceeding

2015

Structures of Flow Separation on a Passenger Car

Sabine Bonitz, Lars Larsson, Lennart Löfdahl et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 8 (1), p. 177-185

Artikel i vetenskaplig tidskrift

2015

Wake and Unsteady Surface-Pressure Measurements on an SUV with Rear-End Extensions

Lennert Sterken, Thies Wölken, Simone Sebben et al

SAE Technical Papers: SAE 2015 World Congress and Exhibition, Cobo Center, Detroit, United States, 21-23 April 2015. Vol. 2015 (April)

Paper i proceeding

2015

Numerical and Experimental Investigations of Brake Cooling for Passenger Cars

Alexey Vdovin, Lennart Löfdahl, Simone Sebben

ATA - Ingegneria dell’Autoveicolo. Vol. 68 (5/10), p. 11-21

Artikel i vetenskaplig tidskrift

2015

A 1D Method for Transient Simulations of Cooling Systems with Non-Uniform Temperature and Flow Boundaries Extracted from a 3D CFD Solution

Blago Minovski, Lennart Löfdahl, Peter Gullberg

SAE Technical Papers: SAE 2015 World Congress and Exhibition; Cobo CenterDetroit; United States; 21 April 2015 through 23 April 2015 (April)

Paper i proceeding

2015

CFD Simulations of one Period of a Louvered Fin where the Airflow is Inclined Relative to the Heat Exchanger

Lisa Henriksson, Peter Gullberg, Dahl Erik et al

SAE International Journal of Engines. Vol. 8 (4)

Artikel i vetenskaplig tidskrift

2015

On the Aerodynamic Performance of two Silver Arrows from the Thirties

Lennart Löfdahl, Alexey Vdovin, Teddy Hobeika

Stuttgart International, Automotive and Engine Technology, 17th 18th March 2015. Vol. 1

Paper i proceeding

2015

CFD Simulations of one Period of a Louvered Fin where the Airflow is Inclined Relative to the Heat Exchanger

Lisa Henriksson, Peter Gullberg, Dahl Erik et al

SAE World Congress 2015, Detroit, USA. SAE Paper 2015-01-1656

Paper i proceeding

2015

Experimental investigation of heat transfer rates and pressure drops through compact heat exchangers: Where the Heat Exchanger is Angled Relative to the Incoming Airflow

Lisa Henriksson, Dahl Erik, Peter Gullberg et al

International Journal of Automotive Engineering. Vol. 6 (1), p. 7-14

Artikel i vetenskaplig tidskrift

2014

Effect of rear-end extensions on the aerodynamic forces of an SUV

Lennert Sterken, Lennart Löfdahl, Thies Wölken et al

SAE Technical Papers. Vol. 1

Paper i proceeding

2014

Experimental Investigation of Heat Transfer Rates and Pressure Drops through Compact Heat Exchangers

Lisa Henriksson, Peter Gullberg, Dahl Erik et al

JSAE Annual Congress on 5, 22 ,2014. Paper 220145253

Paper i proceeding

2014

A Computational Investigation of Ground Simulation for a Saloon Car

Lennart Löfdahl, Josefsson Linda, Jonathan Rice et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 7 (1), p. 111-123

Artikel i vetenskaplig tidskrift

2014

Experimental Investigation of Heat Transfer Rate and Pressure Drop through Angled Compact Heat Exchangers Relative to the Incoming Airflow

Lisa Henriksson, Dahl Erik, Peter Gullberg et al

SAE International Journal of Commercial Vehicles. Vol. 7 (2)

Artikel i vetenskaplig tidskrift

2014

Effect of the traversing unit on the flow structures behind a passenger vehicle

Lennert Sterken, Simone Sebben, Tim Walker et al

IMechE International Vehicle Aerodynamics Conference

Paper i proceeding

2014

Comparative Studies between CFD and Wind Tunnel Measurements of Cooling Performance and External Aerodynamics for a Heavy Truck

Helena Martini, Peter Gullberg, Lennart Löfdahl

SAE International Journal of Commercial Vehicles. Vol. 7 (2)

Artikel i vetenskaplig tidskrift

2014

Investigation of vehicle ride height and wheel position influence on the aerodynamic forces of ground vehicles

Alexey Vdovin, Simone Sebben, Tim Walker et al

International Vehicle Aerodynamics Conference, p. 81-90

Paper i proceeding

2014

Influence of Rims and Tyres on the Aerodynamic Resistance of Passenger Vehicles

Teddy Hobeika, Alexey Vdovin, Lennart Löfdahl

11th Conference Aerodynamik Kraftfahrzeug

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2014

Vehicle Aerodynamics and Thermal Management in Future Hybrid and Electrical Vehicles

Lennart Löfdahl

Energy Efficient Vehicles, Visions, Trends and Solutions for Energy Efficient Vehicle Systems, Editors; B. Bäker & L. Morawietz, Institut für Automobiltechnik, Dresden, TUD Press

Paper i proceeding

2014

Study of Software Integration for Transient Simulation of Future Cooling System for Heavy Truck Application

Blago Minovski, Lennart Löfdahl

SAE International, SAE Technical Paper 2014-01-0653, 2014, doi:10.4271/2014-01-0653.

Paper i proceeding

2014

Study of different tyre simulation methods and effects on passenger car aerodynamics

Teddy Hobeika, Simone Sebben, Lennart Löfdahl

International Vehicle Aerodynamics Conference, p. 187-195

Paper i proceeding

2014

Investigation of three-dimensional flow separation patterns and surface pressure gradients on a notchback vehicle

Sabine Bonitz, Lennart Löfdahl, Lars Larsson et al

Imeche (Hg.) 2014 – International vehicle aerodynamics conference, p. 55-65

Paper i proceeding

2014

Investigation of Wheel Aerodynamic Resistance of Passenger Cars

Alexey Vdovin, Lennart Löfdahl, Simone Sebben

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 7 (2), p. 639-645

Artikel i vetenskaplig tidskrift

2014

Experimental Investigation of Heat Transfer Rate and Pressure Drop through Angled Compact Heat Exchangers Relative to the Incoming Airflow

Lisa Henriksson, Peter Gullberg, Erik Dahl et al

SAE International Journal of Commercial Vehicles. Vol. 7 (2), p. 448-457

Artikel i vetenskaplig tidskrift

2013

Investigation of Wheel Ventilation-Drag using a Modular Wheel Design Concept

Alexey Vdovin, Sabine Bonitz, Christoffer Landström et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 6 (1), p. 308-315

Artikel i vetenskaplig tidskrift

2013

Experimental and Numerical Investigations of the Base Wake on an SUV

Lennert Sterken, Lennart Löfdahl, Simone Sebben et al

SAE Technical Papers: SAE 2013 World Congress and Exhibition; Detroit, MI; United States; 16 April 2013 through 18 April 2013. Vol. 2

Paper i proceeding

2013

CFD simulation and experimental investigation of pressure-drop through 90° and 30° angled compact heat-exchangers relative to the oncoming airflow

Lisa Larsson, Lennart Löfdahl, Peter Gullberg et al

Vehicle Thermal Management Systems Conference, VTMS11; Coventry; UK; 15-16 May 2013, p. 295-305

Paper i proceeding

2013

Performance of an Automotive Under-Body Diffuser Applied to a Sedan and a Wagon Vehicle

Lennart Löfdahl, Ture Jesper Marklund, Gunnar Olsson et al

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 6 (1), p. 293-307

Artikel i vetenskaplig tidskrift

2013

CFD Method and Simulations on a Section of a Detailed Multi-Louvered Fin where the Incoming Air is Directed at 90° and 30° Relative to the Compact Heat-Exchanger

Lisa Henriksson, Erik Dahl, Peter Gullberg et al

SAE 2013 Commercial Vehicle Engineering Congress (SAE Technical Paper), p. paper no. 2013-01-2417-

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2012

Experimental and Numerical Investigation of Wheel Housing Aerodynamics on Heavy Trucks

David Söderblom, Lennart Löfdahl, Elofsson Per et al

SAE International Journal of Commercial Vehicles. Vol. 5 (1), p. 29-41

Artikel i vetenskaplig tidskrift

2012

Aerodynamic Wheel Force Measurements on a Detailed Scale-Model Car – Possibilities and Challenges

Alexey Vdovin, Lennart Löfdahl, Christoffer Landström

8th International Symposium on Strain-Gauge Balances, May 7–10, 2012, Lucerne, Switzerland

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2012

Aerodynamics of passenger vehicles - bluff bodies

Ture Jesper Marklund, Lennart Löfdahl

The Vehicle Component. Vol. 2012 (1)

Artikel i övriga tidskrifter

2012

Yaw- and Trailer Dependence for Rear-Mounted Cooling Installations for Heavy Vehicles

Lisa Larsson, Lennart Löfdahl, Erik Dahl et al

ASME Fluids Engineering Division Summer Meeting (FEDSM), Rio Grande, PR, JUL 08-12, 2012 (PARTS A AND B), p. 31-40

Paper i proceeding

2012

Fordonsaerodynamik - trubbig kropp

Ture Jesper Marklund, Lennart Löfdahl

Fordonskomponenten. Vol. 2012 (1), p. 20-23

Artikel i övriga tidskrifter

2012

Aerodynamic Investigation of Gap Treatment- and Chassis Skirts Strategies for a Novel Long-Haul Vehicle Combination

Helena Martini, Björn Bergqvist, Linus Hjelm et al

SAE Commercial Vehicles

Paper i proceeding

2012

Influence of a Diffuser to the Wake Flow of a Passenger Car

Ture Jesper Marklund, Lennart Löfdahl

FEDSM2012 ASME 2012 Fluids Engineering Summer Meeting, July 8-12, 2012, Rio Grande, Puerto Rico, USA (PARTS A AND B), p. 53-62

Paper i proceeding

2012

Experimental and Numerical Investigation of Wheel Housing Aerodynamics on Heavy Trucks

David Söderblom, Linus Hjelm, Linus Hjelm et al

SAE World Congress 2012

Paper i proceeding

2012

Road Vehicle Aerodynamics at Chalmers University and Forces Acting on the Rotating Wheel

Alexey Vdovin, Lennart Löfdahl

IQPC International Forum Future Automotive Aerodynamics, 26 - 27 November 2012, Berlin, Germany

Poster (konferens)

2012

Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car

Christoffer Landström, Lennart Löfdahl, Walker Tim et al

SAE International Journal of Commercial Vehicles. Vol. 5 (1), p. 136-151

Artikel i vetenskaplig tidskrift

2012

Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car

Christoffer Landström, Lennart Löfdahl, Walker Tim et al

2012 SAE World Congress in Detroit

Paper i proceeding

2012

Alternative Approach in Ground Vehicle Wake Analysis

Lennert Sterken, Lennart Löfdahl, Simone Sebben et al

World Academy Of Science, Engineering and Technology. Vol. 68, p. 104-111

Paper i proceeding

2011

Cooling Airflow System Modeling in CFD Using Assumption of Stationary Flow

Peter Gullberg, Lennart Löfdahl, P. Nilsson

SAE 2011 Commercial Vehicle Engineering Congress, COMVEC 2011, Rosemont, IL, United States, 13-14 September 2011

Paper i proceeding

2011

Aerodynamic Effects of Roof Deflector and Cab Side Extenders for Truck-Trailer Combinations

Helena Martini, Björn Bergqvist, Linus Hjelm et al

SAE Commercial Vehicles, Rosemount, USA, 13-14 september 2011.

Paper i proceeding

2011

Wing-Diffuser Interaction on a Sports Car

Lasse Malmkjaer Christoffersen, David Söderblom, Lennart Löfdahl et al

SAE technical paper. SAE 2011 World Congress and Exhibition, Detroit, 12 April 2011

Paper i proceeding

2011

Role of Aerodynamics and Thermal Management in the Vehicles of Tomorrow

Lennart Löfdahl

Energy Efficient Vehicle Technology I, Editors; B. Bäker & L. Morawietz, Institut für Automobiltechnik, Dresden, Expert Verlag

Paper i proceeding

2011

Cooling Performance Investigation of a Rear Mounted Cooling Package for Heavy Vehicles

Lisa Larsson, Torbjörn Wiklund, Lennart Löfdahl

SAE World Congress 2011, 12-14 April, Detroit, USA

Paper i proceeding

2011

Influences of Different Front and Rear Wheel Designs on Aerodynamic Drag of a Sedan Type Passenger Car

Christoffer Landström, Tim Walker, Lasse Malmkjaer Christoffersen et al

SAE technical paper. SAE 2011 World Congress and Exhibition, Detroit, 12 April 2011

Paper i proceeding

2011

Fan Modelling in CFD Using RANS with MRF, Limitations and Consistency, a Comparison between Fans of Different Design

Peter Gullberg, Lennart Löfdahl

Institution of Mechanical Engineers - VTMS 10, Vehicle Thermal Management Systems Conference and Exhibition, p. 423-433

Paper i proceeding

2011

FAN MODELING IN CFD USING MRF MODEL FOR UNDER HOOD PURPOSES

Peter Gullberg, Lennart Löfdahl

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011

Paper i proceeding

2011

Influence of Different Truck and Trailer Combinations on the Aerodynamic Drag

Helena Martini, Björn Bergqvist, Linus Hjelm et al

SAE 2011 World Congress and Exhibition; Detroit, 12 April 2011

Paper i proceeding

2011

Investigation of Aerodynamic Wheel Designs on a Passenger Car at Different Cooling Air Flow Conditions

Christoffer Landström, Lennart Löfdahl

Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011. Vol. 1 (PARTS A, B, C, D), p. 985-994

Paper i proceeding

2011

Continuing Cooling Performance Investigation of a Rear Mounted Cooling Package for Heavy Vehicles

Lisa Larsson, Lennart Löfdahl, Erik Dahl et al

SAECommercial Vehicles 2011, 13-14 September, Chicago, USA

Paper i proceeding

2010

DRAG AND LIFT MEASUREMENTS OF FOUR BLUFF BODIES

Ture Jesper Marklund, Lennart Löfdahl

General Motors Vehicle Development Research Lab, May 2010, Detroit, USA

Paper i proceeding

2010

Effects of wheel orientation on predicted flow field and forces when modelling rotating wheels using CFD

Christoffer Landström, Simone Sebben, Lennart Löfdahl

8th MIRA International Vehicle Aerodynamics Conference

Paper i proceeding

2010

Interference between engine bay flow and external aerodynamics of road vehicles

Lasse Malmkjaer Christoffersen, Lennart Löfdahl, A. Jönson

SAE 2010 World Congress and Exhibition; Detroit, MI; United States; 13 April 2010 through 13 April 2010

Paper i proceeding

2010

Wheel Housing Aerodynamics on Heavy Trucks

David Söderblom, Per Elofsson, Linus Hjelm et al

The Aerodynamics of Heavy Vehicles III: Trucks, Buses and Trains. Potsdam, GERMANY. September 12-17, 2010

Paper i proceeding

2010

Secondary instability of a swept-wing boundary layer disturbed by controlled roughness elements

Valery Chernoray, A. V. Dovgal, V. V. Kozlov et al

Journal of Visualization. Vol. 13 (3), p. 251-256

Artikel i vetenskaplig tidskrift

2010

Flow Field Investigation of the Wheel Housing Opening Shape on Heavy Truck Using CFD

David Söderblom, Per Elofsson, Linus Hjelm et al

8th MIRA International Vehicle Aerodynamics Conference, p. 387-400

Paper i proceeding

2010

Continued Study of the Error and Consistency of Fan CFD MRF Models

Peter Gullberg, Lennart Löfdahl

SAE World Congress 2010

Paper i proceeding

2010

Effects of Ground Simulation on the Aerodynamic Coefficients of a Production Car in Yaw Conditions

Christoffer Landström, Tim Walker, Lennart Löfdahl

SAE 2010 World Congress and Exhibition; Detroit, MI; United States; 13 April 2010 through 13 April 2010

Paper i proceeding

2010

Wheel Aerodynamic Developments on Passenger Cars by Module-based Prototype Rims and Stationary Rim Shields

Qui Zhiling, Christoffer Landström, Lennart Löfdahl et al

FISITA 2010 Automotive World Congress

Paper i proceeding

2010

WAKE MEASUREMENT OF A SIMPLE BLUFF BODY WITH VARYING REAR END DESIGN AND CLOSE PROXIMITY TO GROUND

Ture Jesper Marklund, Lennart Löfdahl

ASME, FEDSM2010, August 1-5, 2010, Montreal, CANADA

Paper i proceeding

2009

Detailed flow studies in close proximity of rotating wheels on a passenger car

Christoffer Landström, Tim Walker, Lennart Löfdahl

SAE International Journal of Passenger Cars - Mechanical Systems. Vol. 2 (1), p. 861-874

Artikel i vetenskaplig tidskrift

2009

Lägre bränsleförbrukning med hjälp av vindtunneltestning

Christoffer Landström, Lennart Löfdahl

Automotive Sweden - Nyheter i fordonsbranschen Nr 1 2009 (1)

Artikel i övriga tidskrifter

2009

FLOW FIELD AROUND AND IN A SAAB 9-3 CONVERTIBLE

Ture Jesper Marklund, Lennart Löfdahl, Håkan Danielsson

EUROMECH COLLOQUIUM 509,External aerodynamics of Railway Vehicles Trucks Buses and Cars, Berlin, Germany, March 24--25, 2009, p. 144-157

Paper i proceeding

2009

Drag Reduction of a Simple Bluff Body by Changing The Rear End

Ture Jesper Marklund, Lennart Löfdahl

2009 ASME Fluids Engineering Division Summer Conference, FEDSM2009; Vail, CO; United States; 2 August 2009 through 6 August 2009, p. 291-296

Paper i proceeding

2009

Influence of Aerodynamics on the Fatal Crash in Le Mans 1955

Peter Gullberg, Lennart Löfdahl, Zhiling Qiu

European Automotive Simulation Conference

Paper i proceeding

2009

A Correction Method for Stationary Fan CFD MRF Models

Peter Gullberg, Lennart Löfdahl

SAE World Congress & Exhibition (2009-01-0178)

Paper i proceeding

2009

High Level Geometry Restoration for CFD Purposes in ANSA

Peter Gullberg, Lennart Löfdahl

3rd ANSA & META International Conference

Paper i proceeding

2009

Optimizing the Cooling Air Flow of a Formula Car Using CFD

Lasse Malmkjaer Christoffersen, David Söderblom, Lennart Löfdahl

Proceedings of the European Automotive Simulation Conference

Paper i proceeding

2009

Heavy Vehicle Wheel Housing Flows - a Parametric Study

David Söderblom, Lennart Löfdahl, Per Elofsson et al

SAE/SP-2226

Paper i proceeding

2009

Implementing Advanced CAE Tools in Automotive Engineering Education at Chalmers University of Technology

Lasse Malmkjaer Christoffersen, Christoffer Landström, Lennart Löfdahl

3rd ANSA and META International Conference, September 9-11, 2009, Greece

Paper i proceeding

2009

The Aerodynamics of Cooling Air Inlets of Road Vehicles

Lasse Malmkjaer Christoffersen, Lennart Löfdahl

Proceedings of the 7th FKFS conference on Progress in Vehicle Aerodynamics and Thermal Management

Paper i proceeding

2009

A Numerical Investigation of the Influence of Moving Ground and Rotating Wheels on Heavy Duty Vehicle Cooling Performance

Peter Gullberg, David Söderblom, Lennart Löfdahl

SAE World Conference, 20-23 April, Detroit, MI

Paper i proceeding

2009

Investigation of the cooling and underbody flow field on a detailed model scale passenger car. Part 1 - Cooling flows and Reynolds number effects

Lasse Malmkjaer Christoffersen, Christoffer Landström, Lennart Löfdahl

FEDSM2009, ASME Fluids Engineering Division Summer Meeting, Vail, CO, AUG 02-06, 2009. Vol. 2, p. 297-304

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2009

An Investigation of the Aerodynamic Drag Mechanisms due to Ground Simulation in Yawed Flow Conditions for Heavy Trucks

David Söderblom, Per Elofsson, Linus Hjelm et al

Proceedings of FEDSM2009

Paper i proceeding

2009

An Investigation and Correction Method of Stationary Fan CFD MRF Simulations

Peter Gullberg, Lennart Löfdahl

Thermal System Efficiencies Summit, THERMALSYS 2009; Troy, MI; United States; 1 October 2009 through 1 October 2009 (2009-01-3067)

Paper i proceeding

2009

Experimental Investigations of the Drag Reduction on a Generic Tractor-Trailer Configuration Using Active Flow Control in Combination with Solid Flaps

Christian Nayeri Navid, J Haff, David Greenblatt et al

Lecture Notes in Applied and Computational Mechanics, p. 179-191

Paper i proceeding

2009

INVESTIGATION OF THE COOLING AND UNDERBODY FLOW FIELD ON A DETAILED SCALE MODEL PASSENGER CAR - PART 2: EFFECT OF GROUND SIMULATION

Christoffer Landström, Lasse Malmkjaer Christoffersen, Lennart Löfdahl

Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting, p. 305-312

Paper i proceeding

2008

Moving Ground Effects on the Wheelhouse Flows of Heavy Vehicles

David Söderblom, Per Elofsson, Linus Hjelm et al

FISITA World Automotive Congress 2008 (F2008-12-232)

Paper i proceeding

2008

Initial Experimental Investigation of the Local Flow Field Around Rotating Wheels using an Omni-probe

Christoffer Landström, Tim Walker, Lennart Löfdahl

Artikel i vetenskaplig tidskrift

2008

Improving the Cooling Airflow of an Open Wheeled Race Car

Lasse Malmkjaer Christoffersen, David Söderblom, Lennart Löfdahl

Motorsports Engineering Conference & Exposition (SAE 2008-01-2995)

Paper i proceeding

2008

Drag Reduction of Long Haulage Trucks

David Söderblom, Lennart Löfdahl, Per Elofsson et al

The Vehicle Component (3-08), p. 27-28

Artikel i övriga tidskrifter

2008

The L2 Wind Tunnel at Chalmers University of Technology

Christoffer Landström, Lennart Löfdahl

SATA Wind Tunnel Conference, June 7-10, Johannesburg, South Africa

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2008

Flow field investigation around a convertible passenger car using CFD and experiments

Christoffer Landström, Ture Jesper Marklund, Markus Christiansson et al

The Vehicle Component. Vol. 08 (2)

Artikel i övriga tidskrifter

2008

Development of a Model Scale Heat Exchanger for Wind Tunnel Models of Road Vehicles

Lasse Malmkjaer Christoffersen, David Söderblom, Lennart Löfdahl

2008 World Congress; Detroit, MI; United States; 14 April 2008 through 17 April 2008, p. 9-

Paper i proceeding

2008

Influence of Moving Ground Conditions on the Cooling Flows of Road Vehicles

Lasse Malmkjaer Christoffersen, Roy Quartey-Papafio, Christoffer Landström et al

Collection of Technical Papers - AIAA Applied Aerodynamics Conference

Paper i proceeding

2008

On investigation of sinusoidal and varicose instabilities of streaks in boundary layers

V.V. Kozlov, Valery Chernoray, Lennart Löfdahl

Proc. of XXII International Congress of Theoretical and Applied Mechanics, Adelaide, Australia, p. 1-2

Poster (konferens)

2008

The L2 Model Scale Wind Tunnel at Chalmers University of Technology

Christoffer Landström, Lennart Löfdahl

The Vehicle Component. Vol. 08 (10)

Artikel i övriga tidskrifter

2008

Cooling Flow Optimization

Lasse Malmkjaer Christoffersen, Lennart Löfdahl

The Vehicle Component (1-08), p. 3-

Artikel i övriga tidskrifter

2008

3D fan modelling strategies for heavy duty vehicle cooling installations - CFD with experimental validation

Peter Gullberg, Lennart Löfdahl

32nd FISITA World Automotive Congress 2008; Munich; Germany; 14 September 2008 through 19 September 2008, p. 275-284

Paper i proceeding

2008

The Role of Aerodynamics in the 1955 Le Mans Crash

Peter Gullberg, Lennart Löfdahl

Motorsports Engineering Conference; Concord, NC; United States; 2 December 2008 through 4 December 2008

Paper i proceeding

2007

Control of Lambda-structure transformation into a turbulent spot by means of riblets

Yu.A. Litvinenko, Valery Chernoray, V.V. Kozlov et al

Proc. Int. Conf. on Methods of Aerophys. Research, Novosibirsk, Russia,, p. 152-156

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2007

Designing a course for future designers, Advantage – excellence in Engineering Simulation

Robert Nyiready, Lennart Löfdahl

Ansys News. Vol. 1 (1), p. 40-41

Artikel i övriga tidskrifter

2007

Numerical validations of secondary flows and loss development downstream of a highly loaded low pressure turbine outlet guide vane cascade

Johan Hjärne, Jonas Larsson, Valery Chernoray et al

Proc. of ASME TURBO EXPO 2007, Paper no GT2007-27712

Paper i proceeding

2007

Reynolds Effects in Cooling Airflow

Lasse Malmkjaer Christoffersen, Lennart Löfdahl

Proceedings of the 3rd EACC 2007 European Automotive CFD Conference, p. 12-

Paper i proceeding

2007

Aerodynamic Development and Evaluation of a Formula SAE Car Using Numerical Simulations

Peter Gullberg, Lasse Malmkjaer Christoffersen, Lennart Löfdahl

Proceedings of the 3rd EACC 2007 European Automotive CFD Conference, s. 359

Paper i proceeding

2007

Using CFD in the Design of a Model Scale Radiator

David Söderblom, Lasse Malmkjaer Christoffersen, Lennart Löfdahl

EACC 2007 European Automotive CFD Conference

Poster (konferens)

2006

Visualization of sinusoidal and varicose instabilities of streaks in a boundary layer

Valery Chernoray, V. V. Kozlov, Lennart Löfdahl

ERCOFTAC SIG 33 Workshop, Stockholm, p. 29-30

Paper i proceeding

2006

Hot wire visualization of turbulization of complex flows

Valery Chernoray, V.V. Kozlov, Lennart Löfdahl et al

Thermophysics and Aeromechanics. Vol. 13 (2), p. 1-9

Artikel i vetenskaplig tidskrift

2006

Performance and Off-Design Characteristics for Low Pressure Turbine Outlet Guide Vanes: Measurements and Calculations

Johan Hjärne, Jonas Larsson, Lennart Löfdahl

2006 ASME 51st Turbo Expo; Barcelona; Spain; 6 May 2006 through 11 May 2006. Vol. 6 Part A, p. 649-658

Paper i proceeding

2006

Visualization of sinusoidal and varicose instabilities of streaks in a boundary layer

Valery Chernoray, V.V. Kozlov, Lennart Löfdahl et al

Journal of Visualization. Vol. 9 (4)

Artikel i vetenskaplig tidskrift

2006

Experiments on streamwise vortices in a swept wing boundary layer and their secondary instability

V.V. Kozlov, Valery Chernoray, A.V. Dovgal et al

In Laminar-Turbulent Transition. Proc. of Sixth IUTAM Symposium, Bangalore, India 2004, p. 415-418

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2006

An experimental investigation of secondary flows and loss development downstream of a highly loaded low pressure turbine outlet guide vane cascade

Johan Hjärne, Valery Chernoray, Jonas Larsson et al

Proc. of ASME TURBO EXPO, 2006, Barcelona, Spain

Paper i proceeding

2006

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

V.V. Kozlov, Valery Chernoray, Yu.A. Litvinenko et al

In Laminar-Turbulent Transition. Proc. of Sixth IUTAM Symposium, Bangalore, India 2004, p. 419-424

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2006

On nonlinear sinusoidal and varicose instabilities in a boundary layer and their control by riblets

V.V. Kozlov, Valery Chernoray, G.R. Grek et al

Proc. of the Wither Turbulence Prediction and Control Conf., Seoul, Korea, p. 1-2

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2006

Features of laminar-turbulent transition of adverse pressure gradient flows at low and high Reynolds numbers

Valery Chernoray, V.V. Kozlov, Lennart Löfdahl et al

Proc. of the 6th Euromech Fluid Mechanics Conference, 2006, Stockholm, Sweden, p. 82-

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2006

Effect of riblets on nonlinear disturbances in the boundary layer

Valery Chernoray, V.V. Kozlov, Lennart Löfdahl et al

Thermophysics and Aeromechanics. Vol. 13 (1), p. 67-74

Artikel i vetenskaplig tidskrift

2006

WHEEL STRUT INTERFERENCE

Lasse Malmkjaer Christoffersen, Lennart Löfdahl

Proceedings of FEDSM2006, p. 5-

Paper i proceeding

2006

The influence of riblets on the development of a Λ structure and its transformation into a turbulent spot

Yu.A. Litvinenko, Valery Chernoray, V.V. Kozlov et al

Doklady Physics. Vol. 51 (3), p. 144-147

Artikel i vetenskaplig tidskrift

2005

Nonlinear sinusoidal and varicose instability in the boundary layer

V. V. Kozlov, Yu.A. Litvinenko, Valery Chernoray et al

Proc. of Euromech colloquium 468 Multi-scale modelling in the mechanics of solids.

Paper i proceeding

2005

Experimental analysis of the flow-field in a state-of-the-art linear cascade with boundary-layer suction

Johan Hjärne, Valery Chernoray, Jonas Larsson et al

Proc. of ASME TURBO EXPO 2005, Reno, Nevada, USA

Paper i proceeding

2005

Nonlinear sinusoidal and varicose instability in a boundary layer

Yu.A. Litvinenko, Valery Chernoray, V.V. Kozlov et al

Doklady Physics. Vol. 50 (3), p. 147-150

Artikel i vetenskaplig tidskrift

2005

Fluid mixing induced by vibrating walls

F. Carlsson, M. Sen, Lennart Löfdahl

European Journal of Mechanics, B/Fluids. Vol. 24 (3), p. 366-378

Artikel i vetenskaplig tidskrift

2005

Experiments on secondary instability of streamwise vortices in a swept wing boundary layer

Valery Chernoray, A.V. Dovgal, V.V. Kozlov et al

Journal of Fluid Mechanics. Vol. 534, p. 295-325

Artikel i vetenskaplig tidskrift

2005

Adverse pressure gradient effect on nonlinear varicose instability of a streaky structure in an unswept wing boundary layer

Yu.A. Litvinenko, Valery Chernoray, V.V. Kozlov et al

Physics of Fluids. Vol. 17

Artikel i vetenskaplig tidskrift

2005

Hot wire visualizations of breakdown to turbulence in complex flows

Valery Chernoray, V.V. Kozlov, P.R. Pratt et al

Proc. of EUCASS conf., Moscow, Russia, p. 211-216

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2005

Fundamental Fluid Dynamics Relevant to Road Vehicle Aerodynamics (RVAD)

Lennart Löfdahl

Kapitel i bok

2005

A study of the Blasius wall jet

O. Levin, Valery Chernoray, Lennart Löfdahl et al

Journal of Fluid Mechanics. Vol. 539, p. 313-347

Artikel i vetenskaplig tidskrift

2005

A Brief History of Road Vehicle Aerodynamics (RVAD)

Lennart Löfdahl

Kapitel i bok

2005

Review of visualization techniques in exploration of incompressible shear flows

V.V. Kozlov, Yu.A. Litvinenko, Valery Chernoray et al

Proc. of The 8th Asian symposium on visualization

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2005

Hybrid-mounted micromachined aluminum hotwires for wall shear stress measurements

Sjoerd Haasl, Dirk Mucha, Valery Chernoray et al

Journal of Microelectromechanical Systems. Vol. 14 (2), p. 254-260

Artikel i vetenskaplig tidskrift

2005

Riblet-assisted control of transformation of the Λ-structure into a turbulent spot

Valery Chernoray, Yu.A. Litvinenko, V.V. Kozlov et al

Thermophysics and Aeromechanics. Vol. 12 (4), p. 539-548

Artikel i vetenskaplig tidskrift

2004

Secondary instability of stationary vortex packets in a swept wing boundary layer

Valery Chernoray, A.V. Dovgal, V.V. Kozlov et al

In Proc. of XXI International Congress of Theoretical and Applied Mechanics, Warsaw, Poland

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2004

Experimental investigation of a streaky structure varicose instability in a swept wing boundary layer

Yu.A. Litvinenko, G.R. Grek, V.V. Kozlov et al

Thermophysics and Aeromechanics. Vol. 11 (1), p. 13-22

Artikel i vetenskaplig tidskrift

2004

Nonlinear sinusoidal and varicose instability in the boundary layer (review)

Yu.A. Litvinenko, Valery Chernoray, V.V. Kozlov et al

Thermophysics and Aeromechanics. Vol. 11 (3), p. 329-354

Artikel i vetenskaplig tidskrift

2004

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

V.V. Kozlov, Valery Chernoray, Yu.A. Litvinenko et al

Adv. in Turbulence X, Proc. of the Tenth European Turbulence Conference, Trondheim, Norway

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2004

Breakdown of a streak via development of varicose secondary mode on the straight wing with pressure gradient

V.V. Kozlov, Valery Chernoray, Yu.A. Litvinenko et al

In Proc. Int. Conf. on Methods of Aerophys. Research, Novosibirsk, Russia. Vol. 2, p. 107-110

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2004

Steady streaming due to vibrating walls

Fredrik Carlsson, Mihir Sen, Lennart Löfdahl

Physics of Fluids. Vol. 16, p. 1822-

Artikel i vetenskaplig tidskrift

2004

Time-resolved wall shear stress measurements using MEMS

A.N. Gibson, Valery Chernoray, Lennart Löfdahl et al

In Proc. of XXI International Congress of Theoretical and Applied Mechanics, Warsaw, Poland

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2003

Characteristics of a hot wire microsensor for time-dependent wall shear stress measurements

Lennart Löfdahl, Valery Chernoray, S. Haasl et al

Experiments in Fluids. Vol. 35 (3), p. 240-251

Artikel i vetenskaplig tidskrift

2003

Heat transfer effects due to vibrating walls

Fredrik Carlsson, Mihir Sen, Lennart Löfdahl

4th European Conference on Thermal Sciences, 29 th-31st March, Birmingham

Paper i proceeding

2003

Control of spanwise flow instability of a swept wing by suction

Yu.A. Litvinenko, V.V. Kozlov, Valery Chernoray et al

Thermophysics and Aeromechanics. Vol. 10 (4), p. 541-548

Artikel i vetenskaplig tidskrift

2003

Design of a Modern Test-Facility for LPT/OGV flows

Johan Hjärne, Jonas Larsson, Lennart Löfdahl

ASME paper GT2003-38083

Paper i proceeding

2003

Control of cross-flow instability on a swept wing by suction

Yu.A. Litvinenko, V.V. Kozlov, Valery Chernoray et al

Proc. of The 5th EUROMECH Fluid Mechanics Conference, Toulouse, France

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2003

A visualization study of the longitudinal structures of a plane wall-jet

M.V. Litvinenko, Valery Chernoray, Lennart Löfdahl et al

Proc. of The 7th Asian symposium on visualization, Singapore

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2003

Design of a modern test facility for LPT/OGV flows

Johan Hjärne, Lennart Löfdahl, Jonas Larsson

In Proc. Of ASME Turbo Expo 2003, Power for Land Sea and Air, Atalanta Georgia, June 16-19

Paper i proceeding

2003

Measurement of the turbulence intensities in a flat plate boundary layer

G. Mitchell, Valery Chernoray, Lennart Löfdahl et al

Proc. of Turbulence, Heat and Mass Transfer, 4th Int. Symp., Antalya, Turkey, p. 261-268

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2003

A multi-sensor hot-wire anemometer system for investigation of wall-bounded flow structures

F.E. Jørgensen, Valery Chernoray, A.A. Bakchinov et al

Experimental Thermal and Fluid Science. Vol. 27 (2), p. 207-214

Artikel i vetenskaplig tidskrift

2003

A numerical and experimental study of the Blasius wall jet

O. Levin, M. Litvinenko, Valery Chernoray et al

Abstracts of 56th Ann. Meeting of the Div. of Fluid Dyn. APS, East Rutherford, New Jersey

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2003

A visualisation study of the longitudinal structures in the near filed of a plane wall-jet

Lennart Löfdahl, Valery Chernoray, V. V. Kozlov et al

Journal of Flow Vizualisation. Vol. 6 (2)

Artikel i vetenskaplig tidskrift

2003

Effect of streamwise vortices on the transition in the boundary layers and jets

V. V. Kozlov, G. R. Grek, Lennart Löfdahl et al

SIG Workshop on Swirling flows and vortex instabilities, Toulouse, France.

Paper i proceeding

2002

Sensors and Actuators for Turbulent Flows

Lennart Löfdahl, M. Gad-el-Hak

The MEMS Handbook, p. 25-1 - 25-21-

Kapitel i bok

2002

Hybrid mounted micromachined aluminium hot-wire for near-wall turbulence measurements

S. Haasl, D. Mucha, Valery Chernoray et al

15th IEEE International Conference on Micro Electro Mechanical Systems, Las Vegas, Nevada, USA, p. 336-339

Paper i proceeding

2002

An analytical asymptotic solution to a conjugate heat transfer problem

Carl Fredrik Stein, Peter Johansson, Jöran Bergh et al

International Journal of Heat and Mass Transfer. Vol. 45 (12), p. 2485-2500

Artikel i vetenskaplig tidskrift

2002

Design and Fabrication of MEMS velocity and Pressure Sensors

Lennart Löfdahl, M. Gad-el-Hak

Kapitel i bok

2002

Role of the streaky structures in a transition mechanism of the boundary layers and jets

M.V. Litvinenko, Valery Chernoray, V.V. Kozlov et al

In Proc. Int. Conf. on Methods of Aerophys. Research, Novosibirsk, Russia, p. 133-138

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2002

Role of localized streamwise structures in the process of transition to turbulence in boundary layers and jets (review)

V.V. Kozlov, G.R. Grek, Lennart Löfdahl et al

Journal of Applied Mechanics and Technical Physics. Vol. 43 (2), p. 224-236

Artikel i vetenskaplig tidskrift

2002

MEMS Wall Shear Stress Sensors – Experiments, Theory and Modelling

Lennart Löfdahl, M. Gad-el-Hak

Kapitel i bok

2001

A quantitative flow visualization of a point source disturbance in a swept wing boundary layer

P. Pratt, Valery Chernoray, A.A. Bakchinov et al

Abstracts of Euromech colloquium 423, Stuttgart, Germany, p. 56-57

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2001

The role of streamwise structures in the near-field entrainment of plane jet

Valery Chernoray, Andrey Bakchinov, V.V. Kozlov et al

Euromech and Ercoftac colloquium 426, Bergen-Tromsø, Norway, p. 9-10

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2001

Experimental study of the K-regime of breakdown in straight and swept wing boundary layers

Valery Chernoray, A.A. Bakchinov, V.V. Kozlov et al

Physics of Fluids. Vol. 13 (7), p. 2129-2132

Artikel i vetenskaplig tidskrift

2001

Multiwire system for hot-wire measurements in boundary layers

A.A. Bakchinov, Valery Chernoray, F.E. Jørgensen et al

ASME 6th Int. Thermal Anemometry Symp., Melbourne, Australia, p. 1-10

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2001

Longitudinal structures in boundary layers and jets

V.V. Kozlov, Andrey Bakchinov, Lennart Löfdahl et al

In Proc. of the 8th Int. Conf. on Stability of Homogeneous and Heterogeneous Flows, Novosibirsk, Russia, p. 84-

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2000

Patterns of streamwise lambda structures mapped with Mini-CTA hot wire anemometry

Andrey Bakchinov, Valery Chernoray, V. V. Kozlov et al

Artikel i övriga tidskrifter

2000

On K-type transition in swept wing boundary layer in the presence of an acoustic field

Andrey Bakchinov, Valery Chernoray, V. V. Kozlov et al

53rd Ann. Meeting of the Div. of Fluid Dyn., Washington, DC, Nov. 19-21, 2000.

Paper i proceeding

2000

On the Calculation of Streamwise Derivatives from Single Point Measurements

Carl Fredrik Stein, Andrey Bakchinov, Jöran Bergh et al

8th European Turbulence Conference, Barcelona, June 27-30.

Paper i proceeding

2000

Experimental study of the K-regime of breakdown in straight and swept wing boundary layers

A.A. Bakchinov, Valery Chernoray, V.V. Kozlov et al

Abstracts of 53rd Ann. Meeting of the Div. of Fluid Dyn. APS, Washington, DC

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2000

Experimental study of K-regime of breakdown in straight and swept wing boundary layers

Valery Chernoray, A.A. Bakchinov, V.V. Kozlov et al

In Proc. Int. Conf. on Methods of Aerophys. Research, Novosibirsk, Russia. Vol. 2, p. 65-70

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

2000

On the Thermal MEMS-Sensors for Wall-Shear Stress Measurements

Peter Johansson, Lennart Löfdahl, Andrey Bakchinov et al

8th European Turbulence Conference, Barcelona, June 27-30

Paper i proceeding

2000

On K-type transition in swept wing boundary layer in the presence of an acoustic field

Valery Chernoray, A.A. Bakchinov, V.V. Kozlov et al

In Proc. of the 7th Int. Conf. on Stability of Homogeneous and Heterogeneous Flows, Novosibirsk, Russia, p. 141-144

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

1999

MEMS Applications in Turbulence and Flow Control

Lennart Löfdahl, M. Gad-el-Hak

Progress in Aerospace Sciences. Vol. 35, p. 101-203

Artikel i vetenskaplig tidskrift

1999

MEMS based Pressure and Shear Stress Sensors for Turbulet Flows

Lennart Löfdahl, M. Gad-el-Hak

Measurements Science and Technology. Vol. 10, p. 665-686

Artikel i vetenskaplig tidskrift

1999

Pulsed Hot-Wire Measurements in Two- and Three-Dimensional Wall Jets

Hans Abrahamsson, Per-Åge Krogstad, Lennart Löfdahl et al

Experiments in Fluids. Vol. 27, p. 210-218

Artikel i vetenskaplig tidskrift

1999

A Similarity Theory for the Plane Wall Jet

William George, Hans Abrahamsson, J Eriksson et al

Journal of Fluid Mechanics. Vol. 425, p. 361-411

Artikel i vetenskaplig tidskrift

1999

The use of MEMS in Fluid Dynamics

Lennart Löfdahl

Kapitel i bok

1998

The Influence of Temperature on the Measurements of Reynolds Stresses in Shear Free Turbulence Near a Wall

Lennart Löfdahl, Bert Johansson, Christian Andersson

Experiments in Fluids. Vol. 25, p. 160-164

Artikel i vetenskaplig tidskrift

1997

A Shear-Free Turbulent Boundary Layer - Experiments and Modeling

Dag Aronson, Arne V Johansson, Lennart Löfdahl

Journal of Fluid Mechanics. Vol. 338, p. 363-385

Artikel i vetenskaplig tidskrift

1996

A Fast Simple Hot-Wire Method of Determining the Mean Velocity Vector of Complex Three-Dimensional Flows

Lennart Löfdahl, Bert Johansson, Camilla Ljus et al

Experiments in Fluids. Vol. 20, p. 398-400

Artikel i vetenskaplig tidskrift

1996

Silicon Pressure Transducers used to Determine the Longitudinal Correlation Coefficient in a Flat Plate Boundary Layer

Lennart Löfdahl, Edvard Kälvesten, Göran Stemme

Journal of Fluids Engineering. Vol. 118

Artikel i vetenskaplig tidskrift

1996

An investigation of the turbulence field in the three-dimensional wall jet

Hans Abrahamsson, Bert Johansson, Lennart Löfdahl

Advances in Turbulence VI (eds. Gavrilakis et al.), Kluwer, pp. 417-420.

Paper i proceeding

1996

An Integrated Silicon Based Pressure-Shear Stress Sensor for Turbulence Measurements

Lennart Löfdahl, Edvard Kälvesten, Therdoros Hadzianagnostakis et al

Advances in Turbulence VI (eds. Gavrilakis et al.), Kluwer, pp. 465-469.

Paper i proceeding

1996

Analytical Characterisation of Piezoresistive Square Diaphragm Silicon Microphone

Edvard Kälvesten, Lennart Löfdahl, Göran Stemme

Sensors and Materials. Vol. 8, p. 113-136

Artikel i vetenskaplig tidskrift

1996

A Similarity Theory for the Plane Wall Jet

William George, Hans Abrahamsson, Lennart Löfdahl

Third Internatinal Conferece on Engineering Turbulence Modelling and Measurements, 27-29 May, 1996, Crete, Greece

Paper i proceeding

1996

An Integrated Pressure-Velocity Sensor for Correlation Measurements in Turbulent Gas Flows

Edvard Kälvesten, Christian Vieider, Lennart Löfdahl et al

Sensors and Actuators A (52), p. 51-58

Artikel i vetenskaplig tidskrift

1995

An Integrated Pressure-Velocity Sensor for Correlation Measurements in Turbulent Gas Flows

Edvard Kälvesten, Christian Vieider, Lennart Löfdahl et al

Transducers´95- Eurosensors 9, Stockholm

Paper i proceeding

1995

A Small-Size Microphone for Turbulence Measurements

Edvard Kälvesten, Lennart Löfdahl, Göran Stemme

Sensors and Actuators A. Vol. 45, p. 103-108

Artikel i vetenskaplig tidskrift

1995

Measurements of Turbulent Quantities in Complex Three-Dimensional Boundary Layer Flow

Lennart Löfdahl, T.V. Truong, Julius Bruns

Experiments in Fluids. Vol. 17, p. 335-342

Artikel i vetenskaplig tidskrift

1995

Small Piezoresistive Silicon Microphones Specially Designed for the Characterization of Turbulent Gas Flows

Edvard Kälvesten, Lennart Löfdahl, Göran Stemme

Sensors and Actuators A. Vol. 46, p. 151-155

Artikel i vetenskaplig tidskrift

1994

Measurement of the Enstrophy and the Vorticity Vector in a Plane Cylinder Wake using a Spectral Method

Lennart Löfdahl, Bert Johansson, Jöran Bergh

Fifth European Turbulence Conference in Siena, Italy, July 5-8 1994.

Paper i proceeding

1994

Small Silicon Based Pressure Transducers for Measurements in Turbulent Boundary Layers

Lennart Löfdahl, Edvard Kälvesten, Göran Stemme

Experiments in Fluids. Vol. 17, p. 24-31

Artikel i vetenskaplig tidskrift

1994

An Integrated Silicon Based Pressure-Shear Stress Sensor for Measurements in Turbulence Flows

Lennart Löfdahl, Edvard Kälvesten, Therdoros Hadzianagnostakis et al

ASME Symposium on Application of Micro-Fabrication to Fluid Mechanics, 1994 Winter Annual Meeting, Atlanta, November 17-22.

Paper i proceeding

1994

On the Reynolds number dependence of a plane two-dimensional wall jet

Lennart Löfdahl, Hans Abrahamsson, Bert Johansson et al

Proceedings of the 2nd International Conference on Experimental Fluid Mechanics (eds. Onorato), Levotto & Bella, pp. 271-278.

Paper i proceeding

1994

An Estimate of the Pressure Strain, Rate Tensor in a Plane Cylinder Wake

Dag Aronson, Lennart Löfdahl

Fifth European Turbulence Conference in Siena, Italy, July 5-8 1994

Paper i proceeding

1994

Small Piezoresistive Silicon Microphones specially Designed for the Characterization of Turbulent Gas

Edvard Kälvesten, Lennart Löfdahl, Göran Stemme

Eurosensor 8, Toulouse, September 25-28

Paper i proceeding

1994

The Plane Wake of a Cylinder: An Estimate of the Pressure Strain Rate Tensor

Dag Aronson, Lennart Löfdahl

Physics of Fluids. Vol. 6, p. 2716-2721

Artikel i vetenskaplig tidskrift

1994

Silicon Pressure Transducers used to Determine the Longitudinal Correlation Coefficient in a Flat Plate Boundary Layer

Lennart Löfdahl, Edvard Kälvesten, Göran Stemme

ASME Symposium on Application of Micro-Fabrication to Fluid Mechanics, 1994 Winter Annual Meeting, Chicago, November 13-18.

Paper i proceeding

1994

A Turbulent Plane Two-Dimensional Wall-Jet in a Quiescent Surroundings

Hans Abrahamsson, Bert Johansson, Lennart Löfdahl

European Journal of Mechanics/B-Fluids. Vol. 13 (6)

Artikel i vetenskaplig tidskrift

1994

Using Small Silicon Pressure Transducers to Determine the Longitudinal Space-Time Correlation Coefficient of the Wall Pressure

Lennart Löfdahl, Edvard Kälvesten, Göran Stemme

Fifth European Turbulence Conference in Siena, Italy, July 5-8 1994

Paper i proceeding

1993

The Plane Wake of a Cylinder: Measurements and Inferences on Turbulence Modelling

Dag Aronson, Lennart Löfdahl

Physics of Fluids A. Vol. 5, p. 1433-1437

Artikel i vetenskaplig tidskrift

1993

A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers

Lennart Löfdahl, Göran Stemme, Magnus Glavmo et al

Applied Scientific Research. Vol. 51

Artikel i vetenskaplig tidskrift

1993

Determination of Derivative Moments using Two Slanted Hot-Wires and a Spectral method

Lennart Löfdahl, Bert Johansson, Jöran Bergh et al

Experiments in Fluids. Vol. 15, p. 393-400

Artikel i vetenskaplig tidskrift

1993

Influence of Different Sensor Configurations on the Turbulent Quantities in a Complex Three-Dimensional Flow Field

Lennart Löfdahl, T.V Troung, Bert Johansson et al

ASME-Fluid Engineering Conference, Washington DC

Paper i proceeding

1993

Silicon Based Sensors for the Measurement of Turbulence and Wall-Pressure Fluctuations in a Two-Dimensional Flat Plate Boundary Layer

Lennart Löfdahl, Göran Stemme, Bert Johansson

International Conference on Near-wall Turbulent Flows, Tempe, Arizona

Paper i proceeding

1992

A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers

Lennart Löfdahl, Göran Stemme, Magnus Glavmo et al

Fourth European Turbulence Conference, Delft, Elsevier, Amsterdam.

Paper i proceeding

1992

Measured and Modelled Component (11) of the Dissipation Rate Tensor

Dag Aronson, Lennart Löfdahl

13th Turbulence Conference in Missouri-Rolla, Missouri

Paper i proceeding

1992

Studies of the Turbulence Field in a Three-Dimensional Wall-Jet

Lennart Löfdahl, Bert Johansson

Fourth European Turbulence Conference, Delft, Elsevier, Amsterdam

Paper i proceeding

1992

Silicon Based Flow Sensors for Mean Velocity and Turbulence Measurements

Lennart Löfdahl, Göran Stemme, Bert Johansson

Experiments in Fluids. Vol. 12, p. 391-393

Artikel i vetenskaplig tidskrift

1992

Turbulence in a Two-Dimensional Wall-Jet - Experiments and Modeling,

Hans Abrahamsson, Helge Andersson, Bert Johansson et al

13th Turbulence Conference in Missouri-Rolla.

Paper i proceeding

1991

Reynolds Stress Measurements using Direction-Sensitive Double-Chip Silicon Sensors

Lennart Löfdahl, Göran Stemme, Bert Johansson

Measurements Science and Technology. Vol. 2, p. 369-373

Artikel i vetenskaplig tidskrift

1991

Turbulence in the Vicinity of a Rotating Cylinder in a Quiescent Fluid

Helge Andersson, Bert Johansson, Lennart Löfdahl et al

Eight Turbulence Shear Flow Conference, Munchen

Paper i proceeding

1991

Turbulence Measurements in a Two-Dimensional Wall-Jet

Hans Abrahamsson, Bert Johansson, Lennart Löfdahl

Eight Turbulent Shear Flow Conference, München

Paper i proceeding

1991

Flow Visualization and Turbulence Measurements in a Three-Dimensional Turbulence Wall Jet

Martin Eriksson, Bert Johansson, Lennart Löfdahl

First European Fluid Mechanics Conference in Cambridge September 16-20

Paper i proceeding

1990

Turbulence Measurements using Double-Chip Silicon Sensors

Lennart Löfdahl, Göran Stemme, Bert Johansson et al

Third European Turbulence Conference, Stockholm, Springer Verlag, Heidelberg,

Paper i proceeding

1989

Turbulence Measurements in a rotating frame of reference

Lennart Löfdahl

Hydroturbo 89, CSVTS Ostrava, Tjeckoslovakien.

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

1989

Turbulence measurements using sensors based on silicon technology

Lennart Löfdahl, Göran Stemme, Bert Johansson

ICIASF ’89, Deutsche Forschungsanstalt für Luft und Raumfahrt, Research Center Göttingen,W.-Germany, September 18-21, p. 95 - 103

Paper i proceeding

1989

Hot-Wire Measurements Inside a Centrifugal Fan Impeller

Anders Kjörk, Lennart Löfdahl

Journal of Fluids Engineering. Vol. 111, p. 363-368

Artikel i vetenskaplig tidskrift

1989

A Sensor Based on Silicon Technology for Turbulence Measurements

Lennart Löfdahl, Göran Stemme, Bert Johansson

Journal of Physics E. Scientific Instruments. Vol. 22, p. 391-393

Artikel i vetenskaplig tidskrift

1988

Traverse Mechanisms for the Determination of Reynolds Stresses using Hot-Wire Techniques

Lennart Löfdahl

Experiments in Fluids. Vol. 6, p. 352-354

Artikel i vetenskaplig tidskrift

1987

Flow measurements in a radial fan and other turbomachinery bladings using hot-wires, - Cascade flow calculations using PHENICS

Lennart Löfdahl

The first Scandinavian conference on viscous and Turbulent flow in Hydraulic Machinery, Trondheim, Norway, April 28-29, paper F.

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

1987

Blade cooling in high temperature gas turbines – A review of film cooling and some fundamental results

Lennart Löfdahl, Erik Olsson

CIMAC ‘87, T – 16, Warsaw

Paper i proceeding

1986

Hot-Wire Techniques for the Determination of the Reynolds Stress Tensor in Three-Dimensional Flows

Lennart Löfdahl

Dantec Information. Vol. 3

Artikel i vetenskaplig tidskrift

1985

A comparison of Three Different Hot-Wire Techniques for the Detemination of the Reynolds Stress Tensor

Lennart Löfdahl, Erik Olsson

European Mechanics Colloquium 202 on “Measurement Techniques in Low-Speed Turburlent Flows"

Paper i proceeding

1984

Measurements Near the Stern of a Ship Model

Lennart Löfdahl, Lars Larsson

Journal of Ship Research. Vol. 28 (3), p. 186-201

Artikel i vetenskaplig tidskrift

1982

Measurements of Reynolds Stress Profiles in the Stern Region of a Ship Model

Lennart Löfdahl, Lars Larsson

IUTAM Symposium on Three-Dimensional Turbulent Boundary Layers

Paper i proceeding

1979

Uppmätning av turbulenta skjuvspänningar i tredimensionella gränsskikt med hjälp av varmtrådsanemometri - En sammanställning av olika mätmetoder. Intern skrift nr 78/46. Institutionen för tillämpad termodynamik och strömningslära, 1979.

Lennart Löfdahl, Lars Larsson

Rapport

1979

Using Single Rotated Hot Wires for Measuring Reynolds Stress in a Three-Dimensional Turbulent Boundary Layer with Considerable Upwash. SSPA Projektrapport nr 2360-3, 1979

Lennart Löfdahl, Lars Larsson

Rapport

1979

A Method for’Calculating Thick Three-Dimensional Turbulent Boundary Layers. Part I: Equations and General Principles. SSPA Project Report nr 2360-1, 1979.

Lars Larsson, Lennart Löfdahl

Rapport

Lennart Löfdahl

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