STUDY ON INFLUENCE OF BLADE DEFLECTION ON LOAD CHARACTERISTICS OF LARGE FLOATING WIND TURBINE UNDER PITCH CONDITION

Zhang Xianfeng; Zhou Le; Yang Dinghua; Ma Lu; Shen Xin; Du Zhaohui

doi:10.19912/j.0254-0096.tynxb.2024-1544

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 513-520. DOI: 10.19912/j.0254-0096.tynxb.2024-1544

STUDY ON INFLUENCE OF BLADE DEFLECTION ON LOAD CHARACTERISTICS OF LARGE FLOATING WIND TURBINE UNDER PITCH CONDITION

Zhang Xianfeng¹, Zhou Le², Yang Dinghua¹, Ma Lu¹, Shen Xin^2,3, Du Zhaohui^2,3

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Abstract

The effects of blade deflections on the load characteristics of the floating wind turbine under pitch condition are studied by using the vortex wake model and the geometrically exact beam model. The results show that the inflow velocity of the wind turbine will fluctuate significantly with the pitch motion of the floating platform, so the power and thrust of the wind turbine will also be affected, and the power and thrust of the wind turbine will decrease compared with those the rigid-blade case after considering the flexible deflection of the blade. Due to the additional velocity caused by the pitch motion of the floating platform, the tilt moment of both rigid and flexible rotor fluctuate with the phase angle, which is different from that under the surge condition. In addition, the pitch motion of the platform will result in periodic bending and torsional deflections of the blade. The torsional deflections will directly change the angle of attack of the airfoil sections, while the bending deflections will affect the inflow velocity of the airfoil sections. In addition, the inflow wind velocity has significant effect on the wind turbine loads and blade deflections, and a decrease in the inflow wind velocity will increase the influence of the velocity fluctuation caused by the floating platform motion.

Key words

floating wind turbines / aeroelasticity / deflection / free vortex wake model / geometrically exact beam theory

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Zhang Xianfeng, Zhou Le, Yang Dinghua, Ma Lu, Shen Xin, Du Zhaohui. STUDY ON INFLUENCE OF BLADE DEFLECTION ON LOAD CHARACTERISTICS OF LARGE FLOATING WIND TURBINE UNDER PITCH CONDITION[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 513-520 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1544

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