平板に作用する非定常流体力と流れ場の関係

抄録

The purpose of the present study is to investigate the relationship between unsteady drag and flow field for a flat plate during the pitch-oscillating motion. In this study, the angle of attack of the flat plate was alternately changed from 70° to 110° . The flow fields were visualized by using a smoke wire method with a high-speed camera. The roll-up was clearly observed by pitch-oscillation in the shear layer from the edge in comparison with the result under static condition. It is concluded that the drag can be enhanced by the generating vortices due to the pitch-oscillating motion.