INFLUENCE OF PRE-BEND SHAPE ON AEROELASTIC PERFORMANCE OF WIND TURBINE BLADES

Guo Xiaofeng; Huang Xinxiang; Wang Quan; Zhang Ren

doi:10.19912/j.0254-0096.tynxb.2020-0509

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (3) : 442-448. DOI: 10.19912/j.0254-0096.tynxb.2020-0509

INFLUENCE OF PRE-BEND SHAPE ON AEROELASTIC PERFORMANCE OF WIND TURBINE BLADES

Guo Xiaofeng¹, Huang Xinxiang¹, Wang Quan², Zhang Ren¹

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Abstract

In order to study the effect of the pre-bend shape on the aeroelastic stability of wind turbines, by using the parametric modeling method, three blades with different pre-curved shape were constructed. Based on SIMPACK software, the multi-disciplinary model of wind turbines coupling of aerodynamics-elasticity-control was built. As a research object, the performances of a 2 MW wind turbine with different pre-bend blades were studied, the result shows that under turbulent wind conditions with the increase of pre-bend value of the blade-tip, the ultimate loads of the blade root and the dynamic deformations of the blade section near the blade-tip increased significantly. By through the frequency-domain analysis of the pre-bend 5 m blade, resonance occurs near the first natural frequency in edgewise and torsional deflection, which means that the oversize amount of the pre-bend value in blade-tip will cause instability problems.

Key words

wind turbine blades / rigid-flexible coupling / aero-elastic deformation / pre-bend shape / aero-elastic stability

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Guo Xiaofeng, Huang Xinxiang, Wang Quan, Zhang Ren. INFLUENCE OF PRE-BEND SHAPE ON AEROELASTIC PERFORMANCE OF WIND TURBINE BLADES[J]. Acta Energiae Solaris Sinica. 2022, 43(3): 442-448 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0509

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