GROUND EFFECT CALCULATION OF A 2-DIMENSIONAL AIRFOIL OVER A WAVY SURFACE

There are already some works on the ground effect calculation of two-d imensional airfoils flying over a wavy surface. The panel method is ut ilized to handle the same problem in this report. The infinite wavy su rface is approximated by a finite number of panels. This inviscid inco mpressible unsteady flow can be determined by the boundary conditions on the body surfaces, the Kelvin theorem and the Kutta condition at th e trailing edge. The amplitudes of the aerodynamic forces are maximal when the chord length of a two-dimensional airfoil approaches the wave length of the wavy surface.