Abstract
Flows around a flat wing with a pitching motion in a uniform flow are investigated numerically and experimentally. The pitching motion is one cycle of oscillaion with constant angular velocity. The flow patterns are visualized by the tracer techniq using Al-pouder. A vortex is generated when the maximum attack angle is larger than 20°. A pair of vortices is found when the maximum angle is larger than 70°. Numerical analysis is carried out and the Navier-Stokes equations are solved using body-fitted grid with moving boundary system. The experimental results show good agreement with the numerical results.
