0702 渦の変形と音の同時計測(OS7-1 流れと音,オーガナイズドセッション)

概要

論文の詳細を見る
In order to clarify the generation mechanism of aerodynamic sound from a cavity, aerodynamic sound and flow fields around a cavity were measured with a high-speed flow visualization system. In this experiment, we investigated flow pattern around downstream edge of the cavity in sharp edge and round edge. The flow visualization results showed that the amplitude of sound pressure become maximum when the center of the vortex core through the edge. At that time, the vortex core strongly deformed. On the other hand, the vortex deformation is slow in the case of round edge cavity. Then the sound pressure level was smaller than that of the sharp edge. In the case of the large curvature edge, the formation region of vortex core moved to downstream direction and then undeveloped vortex collided with the edge. As a result, aerodynamic sound become much smaller than that of the original cavity.
2009-11-06