采用计算流体力学方法，研究了主流风速为10 m/s，翼型弦长雷诺数为1.2×105条件下振动膜片对NACA0012翼型在18°攻角深失速下流动分离的影响。研究表明：振动膜片能明显提高翼型升力系数、降低阻力系数、改善流场状况；当无量纲频率处在1~1.5范围内时，翼型升阻比可大幅提升，最大可提高75.7%；无量纲振幅对翼型升阻比的影响也很显著，相对于原型存在一个最佳的振幅使得翼型升阻比能获得最大提升；不同振幅下，最佳升阻比对应的无量纲频率随振幅增大而减小。

In this paper, the influence of the vibration diaphragm on the flow separation of a NACA0012 airfoil at 18 degree angle of attack is investigated with the computational fluid dynamics method when the wind speed is 10m/s, Reynolds number is 1.2×105. The study finds that the flow control method can significantly improve the lift coefficient, reduce the drag coefficient and improve the flow field. When the dimensionless frequency f is in the 1 to 1.5 range,the lift to drag ratio increases,the maximum value can be increased by 75.7%; The influence of the dimensionless amplitude on the lift to drag ratio is very significant, there is an optimum amplitude to improve lift the lift-to-drag ratio most relevant to the baseline airfoil; under different amplitude,the dimensionless frequency with the optimum lift-to-drag ratio increases with the increase of the amplitude.

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国家自然科学基金资助项目（51576133，51536006）；上海市科委基地建设项目（13DZ2260900）；上海理工大学流动控制与仿真重点实验室资助项目（D15013）