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

Yang Congxin; Zhang Zhimei; Wang Qiang; Zhang Jianmei; Zhao Bin; Ling Zuguang

doi:10.19912/j.0254-0096.tynxb.2020-1276

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (8) : 253-259. DOI: 10.19912/j.0254-0096.tynxb.2020-1276

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

Yang Congxin^1,2, Zhang Zhimei¹, Wang Qiang¹, Zhang Jianmei¹, Zhao Bin¹, Ling Zuguang¹

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Abstract

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.

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wind turbines / aerodynamic loads / computational fluid dynamics / wind shear / tower shadow effect / blades

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Yang Congxin, Zhang Zhimei, Wang Qiang, Zhang Jianmei, Zhao Bin, Ling Zuguang. INFLUENCE OF TOWER SHADOW EFFECT ON AERODYNAMIC LOAD OF BLADE AND ROTOR OF HORIZONTAL AXIS WIND TURBINES UNDER WIND SHEAR[J]. Acta Energiae Solaris Sinica. 2022, 43(8): 253-259 https://doi.org/10.19912/j.0254-0096.tynxb.2020-1276

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