In recent years, research has found that by reasonably improving the design method of the automotive environmental wind tunnel and optimizing the internal parameters, the flow field index and accuracy of the wind tunnel can be significantly improved. Through collecting and analyzing the relevant literatures, this paper obtains the design optimization direction and method of the automotive environmental wind tunnel, and affirms the bright prospect of the semi-mechanized physical wind tunnel. According to the main performance evaluation indicators of the environmental wind tunnel, the influence factors of the flow field indicators are analyzed, and according to the reduction law of the floor boundary layer, it is found that the horizontal suction effect and the flow field indicators can be effectively improved by optimizing the floor boundary layer of the wind tunnel, improving the horizontal suction intensity and controlling the distance between the air outlet and the vehicle.

Automotive environmental wind tunnel  /  Semi-mechanized physical wind tunnel  /  Horizontal suction system  /  Flow field index