Parabolic flow over a flat plate with wave disturbance in the main stream

In this paper the effects of unsteady flow past a flat plate, which is at rest, are studied when the steady parabolic flow outside the boundary layer is in a wave disturbance. Solutions are developed for large and small times. The behaviour of the amplitudes and phase leads of skin friction components along chordwise and spanwise directions are studied in detail. Two cases, one when the main stream lines are straight and yawed, and the other when the main stream lines are parabolic and concave with respect to the points on the chordwise direction are studied separately and the results are interpreted graphically.