风剪切下塔影效应对水平轴风力机叶片及风轮气动载荷的影响  

INFLUENCE OF TOWER SHADOW EFFECT ON AERODYNAMIC LOAD OF BLADE AND ROTOR OF HORIZONTAL AXIS WIND TURBINES UNDER WIND SHEAR

作　　者：杨从新[1,2] 张志梅 王强 张建梅[1] 赵斌 凌祖光 Yang Congxin;Zhang Zhimei;Wang Qiang;Zhang Jianmei;Zhao Bin;Ling Zuguang(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and Systems,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]甘肃省流体机械及系统重点实验室,兰州730050

出　　处：《太阳能学报》2022年第8期253-259,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(12062012);甘肃省风力机研究专项基金(071904)。

摘　　要：采用CFD方法,以NH1500三叶片大型水平轴风力机为研究对象,研究额定风速剪切来流下的塔影效应对水平轴风力机叶片和风轮非定常气动载荷的影响。结果表明:剪切来流下,叶片和风轮的气动载荷均呈余弦变化规律,塔影效应的主要影响叶片方位角范围为160°~210°,且该范围不随风剪切指数的变化而变化。相同风剪切指数下,塔影效应对叶片和风轮气动载荷的均方根影响较小,对其波动影响较大。当风剪切指数从0.12增至0.30时,塔影效应下,叶片气动载荷的均方根减小,推力和转矩的波动幅度增大,偏航力矩和倾覆力矩的波动幅度减小;风轮推力和转矩的均方根减小,波动幅度变化较小,而倾覆力矩和偏航力矩的均方根增大,且波动幅度也增大。A CFD method is used to study the influence of tower shadow effect on the non-constant aerodynamic loads of the horizontal axis wind turbine blades and wind turbine wheels under shear incoming flow at rated wind speed,using the NH1500 three-blade large horizontal axis wind turbine as the research object.The results show that:the aerodynamic loads of both the blade and the wind turbine under shear incoming flow show a cosine variation law,and the main influence of the tower shadow effect on the blade azimuth range is 160°-210°,and the range does not vary with the wind shear index.Under the same wind shear index,the tower shadow effect has a smaller effect on the root mean square of the aerodynamic loads of the blade and wind turbine,and a larger effect on its fluctuation.When the wind shear index increases from 0.12 to 0.30,the root mean square of blade aerodynamic loads decreases,the fluctuation of thrust and torque increases,and the fluctuation of yaw moment and overturning moment decreases under the tower shadow effect;the root mean square of wind turbine thrust and torque is small and the fluctuation is less,while the root mean square of yaw moment and overturning moment increases and the fluctuation also increases.

关 键 词：风力机 气动载荷 计算流体力学 风剪切 塔影效应 叶片 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]