Abstract: The buffeting of the sunroof has been controlled, but the buffeting of the side window is difficult to control, and there are few studies on the buffeting characteristics of the side window. Taking an SUV as an example, combined with wind tunnel test and simulation, the influencing factors of window buffeting simulation accuracy are explored, and the side window buffeting noise distribution and buffeting characteristics are studied by simulation. The results show that the large eddy simulation(LES) and the improved delayed detached eddy simulation(IDDES) of the turbulence model have higher accuracy, but the accuracy of K-ε can be achieved is poor. The simulation accuracy of the medium using compressible gas is higher, and the sound pressure level of buffeting when using incompressible gas is far lower than the actual. The buffeting of the side windows is evenly distributed in the car, and the buffeting of the front window is weaker than that of the rear window. With the increase of wind speed, the sound pressure level of side window buffeting first increases and then decreases, and the frequency increases all the time. The buffeting sound pressure level of the side window does not change continuously with the window opening size. When yaw at a negative angle, the buffeting of the left window will increase, and vice versa. As the number of passengers increases, buffeting weakens first and then increases; Any combination of opening windows can suppress the buffeting of the side windows, and the buffeting of the left rear window is the lowest when the right front window is opened. The research on the factors affecting the accuracy of buffeting simulation and the summary of the buffeting characteristics of side windows provide a reference for the simulation development and control of passenger car side windows.

Key words: side window buffeting, simulation accuracy, buffeting characteristics, distribution law