STUDY ON VORTEX-INDUCED MOTION CHARACTERISTICS AND SUPPRESSION OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE

Xiao Yanghong; Li Lei; Zhang Zhaode; Li Wenli

doi:10.19912/j.0254-0096.tynxb.2021-0729

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 152-158. DOI: 10.19912/j.0254-0096.tynxb.2021-0729

STUDY ON VORTEX-INDUCED MOTION CHARACTERISTICS AND SUPPRESSION OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE

Xiao Yanghong, Li Lei, Zhang Zhaode, Li Wenli

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Abstract

In order to mitigate the fatigue damage of the riser and mooring system by vortex-induced motion（VIM）, in the present work, a numerical simulation for the characteristics of VIM and suppression mechanism of a new wavy cylindrical structure is proposed. The nonlinear coupling interaction between the structure and fluid is performed by user-defined function （UDF） and dynamic mesh techniques,and the differential equations of motion are solved by the fourth-order Runge-Kutta methods. It was found that the VIM characteristics of the wavy cylinders and cylinder were significantly different. The cylinder shows a significant lock-in characteristic with the increasing reduced velocity,while the response characteristic of the wavy cylinders are related to the wave height Hw/D. The lock-in phenomenon also occurs when the wave height is Hw/D=0.01 and 0.05,but the lock-in region is smaller than that of circular cylinder,and the lock-in problem is no longer occurs when the wavy height is Hw/D=0.02-0.04. The results show that the wavy cylinders have a significant suppression effect on the VIM.

Key words

offshore wind turbines / fluid structure interaction / interference suppression / Runge Kutta method / wavy cylinders

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Xiao Yanghong, Li Lei, Zhang Zhaode, Li Wenli. STUDY ON VORTEX-INDUCED MOTION CHARACTERISTICS AND SUPPRESSION OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 152-158 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0729

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