Wind buffeting noise analysis and control for vehicle under crosswind

The wind buffeting noise characteristics for a car under the condition of cross wind was investigated based on the method of large eddy simulation. A specific car was built and tested firstly on real road in order to verify the accuracy of numerical simulation method. And then the influence factors on wind buffeting noise from different speeds and angles of cross wind were analyzed according to the method introduced above. Finally the idea of adding a V-shaped groove on the B-pillar inner wall is proposed to suppress the wind vibration noise. It showed that the test result was in well agreement with numerical simulation. The wind buffeting noise was higher when the cross wind speed was greater than 5m/s and the angle less than 140°, comparing with none cross wind condition. The wind buffeting noise value may be up to 26dB according to different cross wind angle, and may be unsuitable to open the window. The effect of noise reduction solution is obvious, the value can be as high as 7dB.