风力机翼型在偏航载荷下的复合运动的动态失速分析  

DYNAMIC STALL ANALYSIS OF COMPOUND MOTION OF WIND TURBINE AIRFOIL UNDER YAW LOAD

作　　者：吉正杰 张锦 殷玉枫[1] 冯毅杰[1] 刘佩珊 Ji Zhengjie;Zhang Jin;Yin Yufeng;Feng Yijie;Liu Peishan(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Traffic Vocational and Technical College,Taiyuan 030031,China)

机构地区：[1]太原科技大学机械工程学院,太原030024 [2]山西交通职业技术学院,太原030031

出　　处：《太阳能学报》2021年第6期377-384,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(U1610118);山西省交通运输厅科技计划(2019-1-9)。

摘　　要：为了进一步研究大型风力发电机叶片在偏航载荷下的气动特性,将偏航载荷等效为俯仰运动并与叶片截面翼型的挥舞与摆振运动相结合,以NREL S809翼型为研究对象,使用带转捩修正k-ωSST湍流模型在雷诺数106情况下研究翼型俯仰运动与挥舞、摆振运动以相同频率振荡但具有不同相位差及不同折合频率时对其气动性能的影响。结果表明,翼型在动态失速角附近的挥舞运动速度对翼型的气动力系数有较大影响;翼型俯仰运动与挥舞、摆振运动具有不同相位差时可显著增加或抑制动态失速角;折合频率的改变对于不同相位下复合运动的气动性能有较大影响;在复合运动时动态负载对于相位来说比折合频率更为敏感。In order to further analyze the aerodynamic characteristics of the large wind turbine blades,the yaw load is equivalent to the pitching motion.Based on the k-ωSST turbulence model with transition correction.The effects of the oscillating at the same frequency but with different phase difference and different reduced frequency under the action of the compound motion of the pitch,flapwise and edgewise at Reynolds number of 106 on the aerodynamic performance of the NREL S809 airfoil were studied.The results show that the flapwise velocity near the dynamic stall angle has a great influence on the aerodynamic coefficient of the airfoil.The airfoil pitch can significantly increase or suppress the dynamic stall angle when it has different phase from the flapwise and edgewise motions.The change in the reduced frequency can greatly affect the aerodynamic performance of the compound motion in different phases and the dynamic load is more sensitive to the phase difference than that of the reduced frequency in the compound motion.

关 键 词：风力发电机 动态失速 CFD模拟 摆振 挥舞 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]