三角翼前縁に発生する渦による圧力変動と空力音の特性に関する研究

抄録

Flow around the front-pillar of an automobile is typical of a flow field with separated and reattached flow by a longitudinal vortex. The longitudinal vortex generated behind the front-pillar of a vehicle is reproduced by the three-dimensional delta wing. The wing with attack angle of 15 degrees was merged in the uniform flow speed of 10 m/s. Computational Fluid dynamics (CFD) analyzed time-derivative of surface-pressure-fluctuations and the aerodynamic sound in the far field As a result, it was found that time-derivatives of surface-pressure-fluctuations have correlation with the aerodynamic sound in the far field. This method is considered an effective way to detect the sound sources on the solid body.