Abstract
Many studies on unsteady flow around an unsteady airfoil at low Reynolds number region have been carried out with experimental and numerical approaches. However, the detailed vortex flow structure and the characteristics of dynamic forces have not been understood sufficiently. In order to clarify the detailed vortex flow structure behind unsteady airfoils at low Reynolds number region, we have carried out the particle image velocimetry (PIV) measurement behind an unsteady airfoil in pitching and heaving motions and numerical simulation by advanced vortex method. Moreover, we have performed the numerical simulation behind an elastic airfoil.
