STUDY ON INFLUENCE OF WIND TURBINE BLADE WAKE ON VORTEX-INDUCED VIBRATION CHARACTERISTICS OF TOWER

Su Yi; Tian De; Wang Yong; Meng Huiwen

doi:10.19912/j.0254-0096.tynxb.2025-0274

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 30-38. DOI: 10.19912/j.0254-0096.tynxb.2025-0274

STUDY ON INFLUENCE OF WIND TURBINE BLADE WAKE ON VORTEX-INDUCED VIBRATION CHARACTERISTICS OF TOWER

Su Yi, Tian De, Wang Yong, Meng Huiwen

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Abstract

Aiming at the problem of vortex-induced interference between blade and tower during wind turbine shutdown, a two-dimensional single-degree-of-freedom airfoil-cylinder coupled vortex-induced vibration simulation model is established based on computational fluid dynamics （CFD） method and nested grid technology. The influence of the airfoil wake on the vortex-induced characteristics of the cylinder under two working conditions of fixed and free vibration of upstream airfoil are analyzed. The simulation results show that the combination of CFD and nested grid technology can effectively overcome the problems of grid distortion and negative grid. The amplitude ratio peak error of single cylinder between simulation results and experiments is reduced by 75%, and the calculation accuracy is higher. The wake of the fixed upstream airfoil significantly changes the vortex-induced vibration characteristics of the downstream cylinder. The frequency-locked interval of the downstream cylinder lags behind and the root mean square C_l^RMS of the lift coefficient in the interval increases, resulting in a peak amplitude ratio of 70%-92% higher than that of a single cylinder, and increases with the spacing ratio. When the upstream airfoil vibrates freely, the disturbance of the downstream cylinder to its wake vortex shedding causes the maximum amplitude ratio of the airfoil to be 14%-30% lower than that of the single airfoil. Due to the impact of only the upstream part of the vortex, the amplitude ratio peak in the frequency locking range of the downstream cylinder is 27%-33% higher than that of the fixed upstream airfoil, and the “P+S” type vortex shedding mode is formed at high reduced speed. In addition, the interference effect between the airfoil and the cylinder under the two working conditions decreases with the increase of the spacing ratio.

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wind turbines / fluid-structure interaction / computational fluid dynamics / vortex-induced vibration / blade / tower

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Su Yi, Tian De, Wang Yong, Meng Huiwen. STUDY ON INFLUENCE OF WIND TURBINE BLADE WAKE ON VORTEX-INDUCED VIBRATION CHARACTERISTICS OF TOWER[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 30-38 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0274

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