本文通过数值模拟,研究了S809翼型表面沿切向顺时针方向速度运动时的气动性能.从计算结果看出,翼型表面运动能有效抑制或延缓大攻角流动分离,改善翼型的气动性能。在此基础上,为了仅考虑表面的运动效应,消除翼型几何外形对升阻力系数的影响,本文还研究了皮带轮翼型(由大小两个圆柱驱动的皮带轮)的气动特性。计算结果进一步表明,表面运动能有效地抑制翼型吸力面发生大规模流动分离,并可极大地增加翼型升力系数。 In this paper, the aerodynamic performance of the S809 airfoil when it is moved tangentially clockwise is studied by numerical simulation.The results show that the airfoil surface motion can effectively restrain or delay the separation of flow at high angles of attack, and improve the aerodynamic performance of the airfoil performance. On this basis, in order to consider only the surface movement effect and eliminate the influence of airfoil geometry on the drag coefficient, the aerodynamic characteristics of the pulley airfoil (driven by the size of two cylinders) are also studied. The calculation results further show that the surface movement can effectively suppress the large-scale flow separation of the airfoil suction surface and greatly increase the lift coefficient of the airfoil.