Experimental Aerothermal Study on Internal Jet Engine Structures
Licentiate thesis, 2020

For commercial aviation, one potential gain in efficiency can be found in the jet engine auxiliary modules, such as internal jet engine components. These components have historically largely been overlooked, prioritising units such as turbines or compressors. The publically available information for these auxiliary units is therefore relatively sparse even though they can enable substantial weight reduction and novel synergistic integration. The continuously increased fidelity of modern numerical tools poses a dilemma to the experimentalist. Higher accuracy and resolution are sought, but the accuracy of the experimentalist tools has stagnated.

This thesis summarises instrumentation implemented methods in the Turbine Rear Structure(TRS). For the multi-hole probe and heat transfer measurement via IR-thermography a comprehensive uncertainty analysis and error mitigations are presented.

The work presents a relatively high accuracy of 4% to 6% for the performed heat transfer studies on the outlet guide vane in the TRS. The presented implementation of the multi-hole probe in the TRS provides up to twice as high accuracy compared to conventional installation. Both approaches are general with few geometrical limitations and can be implemented on studies with similar ambient conditions.

Two different Reynolds numbers, several flow-coefficients and three different surface roughness numbers have been investigated and novel results regarding transition location, streamline, heat transfer and loss distribution are presented in the attached papers.

Intermediate Compressor Duct

Aerothermal

multi-hole probe

Turbine Rear Structure

transition

experimental

IR-thermography

The dissertation can be accessed through Zoom, and the room will open shortly before 13:00. In case there will be any updates about the event, these will be posted on this website.
Opponent: Carlos Arroyo

Author

Isak Jonsson

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

EFFECT OF SURFACE ROUGHNESS ON AERODYNAMIC PERFORMANCE OF TURBINE REAR STRUCTURE

PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, 2019, VOL 1,; (2019)

Paper in proceedings

Surface roughness impact on secondary flow and losses in a turbine exhaust casing

Proceedings of the ASME Turbo Expo,; Vol. 2B-2018(2018)

Paper in proceedings

Jonsson I., Chernoray v., Dhanasegaran R., Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Engine Exit Module

Jonsson I., Deshpande S., Chernoray V., Thulin O., Larsson J., Numerical and Experimental Study off Transition in an Engine Exit Module

Subject Categories

Aerospace Engineering

Energy Engineering

Fluid Mechanics and Acoustics

Infrastructure

Chalmers Laboratory of Fluids and Thermal Sciences

Thesis for the degree of Licentiate – Department of Mechanics and Maritime Sciences: 2020:12

Publisher

Chalmers University of Technology

The dissertation can be accessed through Zoom, and the room will open shortly before 13:00. In case there will be any updates about the event, these will be posted on this website.

Online

Opponent: Carlos Arroyo

More information

Latest update

6/12/2020