Numerical and Experimental Study on Cornering Unsteady Aerodynamic Performance of Formula SAE Racing Car

Abstract:

The unsteady flow simulation method was used to study the aerodynamic performance of the Formula SAE racing car during cornering. By using the unsteady flow method， the flow speed was set as a field function varying with time to accurately simulate the cornering situation， and the simulation results were compared with the steady cornering simulation. In conjunction with simulation results， the local flow field of diffuser and rear wing was quantitatively studied in road test using surface pressure measurement. The results show that， the front wheels and wings have a great effect on the downstream bottom airflow during unsteady cornering， and the unsteady aerodynamic robustness of the diffuser is the key point of the racing car aerodynamic design.