133流れによって変動する弾性壁面の画像計測

抄録

It is known that a dolphin can swim with high speed than that of normally estimated. One of the reasons would be of small frictional resistance owing to a compliant surface. However, its phenomena has not been investigated clearly yet. This paper describes the attempt to measure the surface deformation of the complaint wall in a turbulent flow. Since the displacement of the wall would be very small, a new image measurement method has been developed using More's fringe technique and the so-called spatio-temporal derivative method. The result shows that the compliant surface is clearly vibrated due to the turbulence of flow.