Reduction of Aeolian Noise from Roof Rack Cross Bars Using Asymmetric Section Geometry

비대칭 단면 형상을 이용한 루프랙 크로스바의 윈드노이즈 저감

Roof racks have become a very popular feature of vehicles as the market demand for SUV's and RV's has increased drastically over the years. Aeolian tone from the cross bars however. could be a source of severe discomfort for the passengers. Both experimental and numerical steps are taken to enhance the understanding of the generation mechanism of the wind noise. A successful reduction of the noise is achieved by imposing asymmetry in the section geometry, which reduces the strength of Karmann vortices shed downstream.