905 三次元振動翼後方での渦の挙動の可視化(OS11-(2) 流体工学・熱流体,オーガナイズドセッション)

概要

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For predicting the hand force in swimming, the quasi-steady-state approach led to errors in predicting the fluid forces acting on a hand in unsteady conditions. The actual motion of a hand in swimming is obviously unsteady, and the time-dependent fluid forces have to be taken into account. The purpose of this study is to investigate the relationship between unsteady fluid forces and vortex behaviors for a three-dimensional airfoil during the pitching motion. In this study, the flow visualization technique was used to aid in understanding the flow field in the near field of the airfoil edge for the wind tunnel test. The unsteady fluid forces were affected by the behavior of vortices shedding from the airfoil edge during the pitching motion, and the flow structure due to the vortex behavior was strongly affected by the reduced frequency.
2009-08-25