INFLUENCE STUDY ON AERODYNAMIC COUPLING EFFECT OF LONG FLEXIBLE BLADES ON LOAD CHARACTERISTICS OF LARGE WIND TURBINES UNDER WIND SHEAR CONDITIONS

Li Yijia; Zhou Le; Ma Lu; Lei Xiao; Shen Xin; Du Zhaohui

doi:10.19912/j.0254-0096.tynxb.2024-1288

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 751-761. DOI: 10.19912/j.0254-0096.tynxb.2024-1288

INFLUENCE STUDY ON AERODYNAMIC COUPLING EFFECT OF LONG FLEXIBLE BLADES ON LOAD CHARACTERISTICS OF LARGE WIND TURBINES UNDER WIND SHEAR CONDITIONS

Li Yijia¹, Zhou Le¹, Ma Lu², Lei Xiao², Shen Xin^1,3, Du Zhaohui^1,3

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Abstract

Based on dynamic blade element momentum and geometrically exact beam theory, the effect of aerodynamic coupling effect on the load characteristics of IEA-15 MW wind turbines under wind shear conditions are studied in this paper. The results show that the wind turbine loads are similar to simple harmonics under the wind shear condition, and the flexible deformation of the blades will lead to the reduction of the wind turbine loads. Due to the dynamic inflow effect, unsteady aerodynamic characteristics of airfoil and blade deformation, the delay of wind turbine load response will increase the yaw torque of wind turbine. With the increase of wind shear coefficient, the mean value and fluctuation amplitude of wind turbine power, thrust, wind turbine pitch moment and yaw moment increase, and the hysteresis of blade load response becomes more obvious.

Key words

wind turbines / aerodynamics / aeroelasticity / flexible deformantion / wind shear / geometrically exact beam theory

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Li Yijia, Zhou Le, Ma Lu, Lei Xiao, Shen Xin, Du Zhaohui. INFLUENCE STUDY ON AERODYNAMIC COUPLING EFFECT OF LONG FLEXIBLE BLADES ON LOAD CHARACTERISTICS OF LARGE WIND TURBINES UNDER WIND SHEAR CONDITIONS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 751-761 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1288

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