In this paper, the dynamic stall characteristics of the S809 airfoil have been numerically predicted, and the flow under dynamic stall condition has been controlled by introducing synthetic jet for enhancing the airfoil aerodynamic performance. In addition, experimental results have been adopted to validate the obtained numerical ones. The results show that the oscillation of the airfoil can delay the occurring of stall, and the stall angle of attack is increased from 9.5° to 13.1°. The introduction of synthetic jet can improve the lift coefficient of airfoil under dynamic stall conditions: The mean lift coefficient in a period of oscillation has been increased by 33%, and the drag coefficient has been reduced by 39%. Moreover, the stall angle of attack is increased from 13.1° to 16.2°. Therefore, the airfoil performance under dynamic stall condition could be greatly improved by the introduction of synthetic jet technology.

本文对S809机翼的动态失速特性进行了数值预测，并通过引入合成射流来控制动态失速条件下的流量，以增强机翼的空气动力性能。另外，已经通过实验结果来验证所获得的数值。结果表明，机翼的振动可以延缓失速的发生，失速迎角从9.5°增加到13.1°。引入合成射流可以提高机翼在动态失速条件下的升力系数：振荡期间的平均升力系数提高了33％，阻力系数降低了39％。而且，失速迎角从13.1°增加到16.2°。因此，