Plasma Streamwise Vortex Generators for Flow Separation Control on Trucks

Authors: Vernet, J., Örlü, R., Söderblom, D., Elofsson, P.A., Alfredsson, P.H.
Document Type: Article
Pubstate: Published
Journal: Flow Turbulence and Combustion
Volume: 100   1101-1109
Year: 2018


An experimental study of the effect of Dielectric Barrier Discharge plasma actuators on the flow separation on the A-pillar of a modern truck under cross-wind conditions has been carried out. The experiments were done in a wind tunnel with a 1:6 scale model of a tractor-trailer combination. The actuators were used as vortex generators positioned on the A-pillar on the leeward side of the tractor and the drag force was measured with a wind-tunnel balance. The results show that the effect at the largest yaw angle (9 degrees) can give a drag reduction of about 20% and that it results in a net power reduction. At lower yaw angles the reduction was smaller. The present results were obtained at a lower Reynolds number and a lower speed than for real driving conditions so it is still not yet confirmed if a similar positive result can be obtained in full scale.