906 泳者の手を模擬した円盤翼からの放出渦の動的挙動(OS11-(2) 流体工学・熱流体,オーガナイズドセッション)

抄録

To investigate the dynamic behavior of vortex shedding from a discoid airfoil, which simulates a hand of swimmer, we made an experiment using a wind tunnel. The structure of flow from the pitching airfoil is measured by particle image velocimetry (PIV). It was cleared that the reduced frequency k and the amplitude of pitching motion affect of the flow structure. The flow structures due to vortex shedding from a discoid airfoil edge during the pitching motion were affected by the reduced frequency k. The effect was dependent on the reduced frequency k rather than the amplitude of pitching motion. In addition, the reduced frequency k gave more prominent effect on the velocity profiles in the wake rather than the amplitude of pitching motion.