Abstract：In order to reduce the fatigue load of large scale wind turbine caused by the increasing blade length and weight, and to improve blade aerodynamic performance, the flexible deformation of airfoil was realized by considering the trailing edge swing angle as control variable, and the static lift-drag characteristics of both original and deformed airfoil were analyzed.Different influences on aerodynamic characteristics by changing the angle of attack or the swing angle were compared, and the static surface pressure distribution of the flexible airfoil and its dynamic lift-drag characteristics were studied. The results show that compared with the original airfoil, proper trailing edge deformation can improve the lift coefficient, and can reduce the resistance coefficient. Therefore, more efficient active control of flow field can be achieved. Alternate change of functions of airfoil pressure side and suction surface can be achieved by the airfoil flexible deformation, which can realize the control of airfoil aerodynamic performance. Compared with the rigid airfoil, both static and dynamic characteristics of flexible airfoil show different changing law.
叶舟, 赵海洋, 高伟, 李春. 柔性翼型主动控制与气动特性分析[J]. 排灌机械工程学报, 2013, 31(10): 884-887.
Ye Zhou, Zhao Haiyang, Gao Wei, Li Chun. Analysis on active control and aerodynamic characteristics of flexible airfoil. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(10): 884-887.
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