サッカーボール後流のPIV解析と空力振動

抄録

It is thought that the jet flow between the three dimensional twin vortices that can be generated in the ball downstream flow greatly influences the cause of the knuckle shot. In this study, by synchronizing the Stereo 3D-PIV and the three component load cell, the fluctuated fluid force of the ball and the jet flow which can be made in the soccer ball wake in the speed range of the knuckle ball speed was measured and the phenomenon of the knuckle shot was ellucidated dynamically and visual analytically. As a result, the high correlation was confirmed between the fluctuations in the fluid force and the wake fluctuation acting on the ball.