Effect of Acoustic Excitation on Flow Asymmetry over Slender Body at High Angles of Attack

Abstract

A new kind of flow control method, acoustic excitation, was applied to control flow asymmetry over a slender body at high angles of attack. Results show that acoustic excitation could improve the asymmetric behaviors as long as controlling conditions are chosen appropriately. The development of asymmetric vortices on the leeward along the model axis would be greatly affected by acoustic excitation. Moreover, the fluctuation energy in the boundary layer could be reduced.