Development of Active Flow Control for Trucks
Paper i proceeding, 2018

The possibility to actively control the external aerodynamic of vehicles is an attractive yet challenging solution to decrease the aerodynamic drag and the fuel consumption. The work flow that describes the implementation of an Active Flow Control (AFC), for the suppression of the separated flow at the A-pillar of a truck, is summarised in this paper. The presented work spans from a theoretical verification of the method to a preliminary implementation of an AFC on a real full-scale truck cabin. The study involves numerical (CFD) and experimental work, including aerodynamic test in a full scale wind tunnel. The initial CFD simulations of a simplified A-pillar were performed using turbulence resolving numerical method large-eddy simulations (LES). A second step consisted in simulation of a simplified truck cabin using hybrid Partially-Averaged Navier-Stokes simulations (PANS). The AFC was created using synthetic jets produced by the use of loudspeakers mounted in the A-pillars of the model. The numerical and experimental investigations were used to optimise the actuation parameters leading to maximum drag reduction. The final step of the validation of the AFC concept was achieved with a full scale test experimental campaign of a Volvo Truck cabin equipped with the studied AFC device.

truck aerodynamics

Aerodynamic drag reduction


wind tunnel


Partially- Averaged Navier-Stokes


active flow control


Guglielmo Minelli

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Erwin Adi Hartono

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Valery Chernoray

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Linus Hjelm

Volvo Group

Branislav Basara


Sinisa Krajnovic

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Proceedings of the Thermal and Fluids Engineering Summer Conference

23791748 (eISSN)

9781567004724 (ISBN)

3rd Thermal and Fluids Engineering Conference (TFEC) Fort Lauderdale, FL, USA, 2018-03-04 - 2018-03-07
Fort Lauderdale, USA,




Rymd- och flygteknik


Strömningsmekanik och akustik


Chalmers strömningslaboratorium



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