EXPERIMENTAL AND NUMERICAL STUDY OF SUPPRESSION EFFECT OF SPLITTER PLATE ON VORTEX-INDUCED MOTIONS OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE

Li Lei; XiaoYanghong; Xu Peng; Pan Yun; Xia Haishan

doi:10.19912/j.0254-0096.tynxb.2023-0021

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (2) : 181-188. DOI: 10.19912/j.0254-0096.tynxb.2023-0021

EXPERIMENTAL AND NUMERICAL STUDY OF SUPPRESSION EFFECT OF SPLITTER PLATE ON VORTEX-INDUCED MOTIONS OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE

Li Lei^1,2, XiaoYanghong³, Xu Peng¹, Pan Yun¹, Xia Haishan¹

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Abstract

Vortex induced motion （VIM） is an important cause for fatigue damage of the mooring system of floating structures. The present work studies the suppression effect of the splitter plate on the VIMs of the Spar-type floating offshore wind turbine （FOWT） through model tests and numerical simulations. The influences of the length of splitter plate L/D on the VIM characteristics are focused. It is found that at the splitter plate length of L/D=0, the intensification of vortex-induced responses with the increased velocity manifests three sub-stages （i.e., upper branch, lock-in region and desynchronization） and the vortex-induced resonance occurs. When the splitter plate length is L/D≥0.2, the vortex-induced resonance does not occur anymore, and more specifically, the suppression on VIMs reaches over 70% when the splitter plate length is L/D≥0.4. It is also found that the splitter plate can induce yaw motions of the Spar-type FOWT. Results show that the splitter plate has a significant suppression effect on the VIMs of Spar-type FOWT.

Key words

offshore wind turbines / dynamic response / interference suppression / circular cylinder / splitter plate

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Li Lei, XiaoYanghong, Xu Peng, Pan Yun, Xia Haishan. EXPERIMENTAL AND NUMERICAL STUDY OF SUPPRESSION EFFECT OF SPLITTER PLATE ON VORTEX-INDUCED MOTIONS OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2024, 45(2): 181-188 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0021

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