The aerodynamic drag of road vehicles is dominated by pressure drag due to flow
separation. Cosidering the importance of road transport for both passengers and
goods, reducing the aerodynamic drag can have a significant impact on global
fuel consumption and greehose gas emissions. Results are presented for active
flow control approaches applied to different vehicle models. The goal is to
modify the separated flow field downstream of the vehicle such that the pressure
drag is reduced. The control approaches comprise active blowing, suction, or a
combination of both. The control is applied to the Ahmed body, using different
slant angles (25, 35, and 90 degrees). The investigations are carried out using
Large-Eddy simulations.