Flows around a pitching wing (Body fitted grid generation with a moving boundary)
In this study, flows around a pitching wing in a uniform flow is investigated numerically. The time-dependent curvilinear coordinate system which coinsides with a moving boundary is transformed into a fixed rectangular coordinate system in a cal-culational plane. The incompressible Navier-Stokes equations are solved using the finite difference method in the calculational plane(1). (2). Two cases of pitching motion, that is, a sinusoidal oscillation and an oscillation with constant angular velocity are analyzed. The effects on the flow of the angular velocity and the maximum attack angle of the wing are researched. The changes in CD and CL during the pitching motion are obtained. The flow field is analyzed and stream lines, pressure contour and pressure distributions along the wing are obtained. The numerical results are compared with the experimental ones obtained by flow visualization.
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