平板扰流片振动诱导涡运动研究

 本文研究了平板上扰流片静止及振动时所诱导的分离涡的形成过程。当拢流片静止时。在拢流片后仅形成不规则的大尺度涡,一旦执流片振动。就诱导出有固定频率的分离涡。拢流片振动频率,对分离涡的尺度、强弱、成对、合并过程有重要影响。文中还对的流片振幅大小的影响进行了讨论。

STUDY OF VORTEX MOTIONS fNDUCED BY OSCILLATING SPOILER ATTACHED TO FLAT PLATE

The forming and developing process of the separated vortex induced by a spoiler attached to a flate plate is presented. The spoiler is either stationary or oscillatory. When the spoiler is in the stationary state, a separated flow with larger-scale random vortices is formed behind the spoiler. As soon as the spoiler oscillates, induced vortices with definite frequencies appear downstream. The test results show that the scale, intensity, pairing and merging of the vortices depend, to a large extent, on the forced oscillation frequencies of the spoiler. The effects of the oscillation amplitude of the spoiler over the vortex is also discussed.