中文摘要：

环量控制能够显著提高升力,改善飞行器短距起降性能。首先从机理上分析了环量控制的作用原理,然后通过CFD数值仿真方法研究环量控制对翼型气动特性的影响规律,采用雷诺平均N-S方程,SST湍流模型,将射流口边界条件设为反映动量系数的速度入口,分别模拟了动量系数和迎角对升阻特性和附面层分离特性的影响规律。结果表明：在α=0°,Cμ=0.05时,升力增加327%,效费比ΔCy/ΔCμ为21.97;随着动量系数增加,前缘分离导致失速迎角提前,在中等动量系数和小迎角状态能够获得优良的升阻特性。

英文摘要：

High lift can be obtained through circulation control to improve short take-off and landing. In this paper, the concept and theory of circulation control are presented. The influence of different momentum coefficients and angle of attack on the lift, drag and boundary separation is investigated through CFD method.The methods include Reynolds-Averaged Navier - Stokes Equations, SST turbulence model and velocity inlet condition at jet boundary. It is revealed that the lift augmentation reaches to 327% and ΔCy/ΔCμ=21.97 at α =0° and Cμ=0.05. The stall angle of attack becomes smaller with the increase of momentum coefficients, which is caused by boundary separation at the leading edge. The excellent aerody- namic characteristics are obtained at moderate momentum coefficients and small angle of attack.