声激励下绕二维薄翼非定常位势流的理论分析

本文根据无粘流体的非定常热流理论，推导出声源在亚声速不可压缩流场中对机翼产生的非定常流体动力的精确解，讨论了典型翼段上单极子声源的位置对声致气动载荷的影响，并通过对声－涡耦合的分析，解释了限于弱扰动的声激励消除颤振的机理，为有源声控制技术应用于流致振动和涡流的控制提供了理论基础。

Theoretical Analysis of Unsteady Potential Flows Around Two-Dimensional Thin Airfoil Induced by Acoustic Excitations

In this paper,based on the unsteady potential theory of the inviscid fluid, the exact solutions of unsteady fluid dynamics induced by sound sorces in subsonic incompressible flows are derived, and the effects of the monopole sound sorce positions in the typical wing section on the acoustically induced aerodynamic loads are discussed. The analysis of the acoustic-vortex coupling explains the mechanism of the weak acoustic perturbation flutter surppression. It provides the theoretical foundation for the active acoustic control techniques applied to the control of fluidinduced vibration and vortex.