Gurney襟翼对风力机专用翼型气动性能的影响

Effect of Gurney Flap on Aerodynamic Performances of Special Airfoil for Wind Turbine

为了研究Gurney襟翼对风力机专用翼型的增升效果,采用数值求解N-S方程的方法,对装有Gurney襟翼的DU95-W-180翼型进行了数值计算,在翼型尾缘压力面添加高度为弦长的1%、2%、3%、4%的Gurney襟翼,攻角范围为-8°~18°,计算各种工况下的翼型气动性能并与原翼型气动性能相比较。结果表明：Gurney襟翼对风力机专用翼型有很好的增升效果,而且增升效果与高度密切相关,襟翼高度越大,升力系数越大,相应的阻力系数也会增大。Gurney襟翼的最佳应用场合为中高升力系数情况,在中小升力系数情况下不宜使用。

In order to determine the effects of Gurney flaps on dedicated airfoil of wind turbine,DU95-W-180 airfoil with Gurney flaps was calculated numerically by solving the N-S equations,the height of flaps were 1%,2%,3%,4% of the airfoil chord respectively and the angle of attack varied from-8°～18°,the aerodynamic performance of airfoils of various working conditions were calculated and compared with that of original airfoil.the comparison shows that Gurney flap has good performance for dedicated airfoil wind turbine,and the performance is closely related with the height of the flap,and the higher the flaps,the larger the lift coefficient and the corresponding friction coefficient.The Gurney flap should be employed at moderate-to high lift coefficient conditions,while not advisable at low-to-moderate life coefficient conditions.