運動翼の弾性変形による渦度の成長

抄録

In recent years, there has been increasing interest in the flow field around elastic airfoils that perform unsteady motion, and many studies have been conducted using experimental and numerical approaches. There are many reports on the relationship between the wake structure of the unsteady airfoils and the dynamic fluid force acting on them. On the other hand, the dynamic behaviors of micro vortex structure and the growth process of the vortex structure have not been clarified sufficiently. The purpose of our present study is to clarify the growth process of the vortex structure in the vicinity of the wall. Especially, the authors focus on the movement of the wall and defined the as the temporal change in the spatial gradient in order to evaluate the elastic deformation quantitatively. The authors perform the numerical simulation of the flow field around a heaving elastic airfoil by using ANSYS CFX 17.0 and investigate the dynamic behaviors of the vorticity in vicinity of the wall.