DRAG REDUCTION OF A GENERIC PASSENGER CAR USING VORTEX GENERATOR WITH DIFFERENT YAW ANGLES

Large investments are aimed at minimizing power needed for propulsion i.e., new downsized engines with new aerodynamic devices for drag reduction. For passenger vehicles the aerodynamic drag force is the dominating resistance force at higher velocity. The vehicle body is often optimized for reducing the drag resistance. Recently, automobile industry started utilizing computer simulations like CFD (Computational Fluid Dynamics) to develop and design car body. Previously, it prepared actual car body model, and it evaluated car body aerodynamic character by running wind tunnel test. To prepare actual car body model takes time and cost. Therefore, it tended to decrease wind tunnel test and increase computer simulation. But, to re- enact actual car running had difficulty in CFD, and it had some problems like computational result accuracy.