Using the Numerical Simulation Analyzes the Influence of the Rear Wing on the Car's Aerodynamic

Using the MIRA model and rear wing of UIUC database model study the influence of the rear wing on the car's aerodynamics. The aerodynamics of seven different positions of the rear wing and unloaded rear wing are compared under the same attack angle. Numerical simulation finds that because of the rear wing's setting, the vortex at the top of the truck and rear of the car are decreased, so the pressure drag of the car and the drag coefficient are increased. The rear wing also destroy the vortex of the car, which increases the negative lift coefficient. The results show that the vehicle can acquire maximum lift coefficient when B/H is 45%. The influence of the car gradually disappeared when the height of the rear wing increases to a certain level. The vehicle will acquire greater negative lift in faster speed.