NUMERICAL STUDY ON VORTEX-INDUCED VIBRATIONS OF COMBINED WIND,WAVE, AND TIDAL POWER GENERATION DEVICE

Wang Jiazheng; Sun Hongyuan; Lin Haihua; Jiao Bo; Liu Dexin; Sun Guang

doi:10.19912/j.0254-0096.tynxb.2023-1061

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (11) : 545-552. DOI: 10.19912/j.0254-0096.tynxb.2023-1061

NUMERICAL STUDY ON VORTEX-INDUCED VIBRATIONS OF COMBINED WIND,WAVE, AND TIDAL POWER GENERATION DEVICE

Wang Jiazheng¹, Sun Hongyuan¹, Lin Haihua¹, Jiao Bo¹, Liu Dexin¹, Sun Guang¹

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Abstract

This paper employs Fluent to simulate the hydrodynamic characteristics of the Wind, Wave, and Tidal Power Generation Device. The fluid-structure interaction simulation of a circular cylinder oscillator is achieved through the use of User-Defined Functions （UDFs） and dynamic mesh technology for analyzing the characteristics of vortex-induced vibration（VIV） of the circular cylinder oscillator. The VIV characteristics of the circular cylinder oscillator in the Wind, Wave, and Tidal Power Generation Device are analyzed from five aspects： forces, motion frequency, amplitude, trajectory, and lift-to-drag ratio. Furthermore, by comparing various motion patterns such as cylinder flow, forced motion, unidirectional vortex-induced vibration, and bidirectional vortex-induced vibration, the vortex shedding modes of the circular cylinder oscillator in the Wind, Wave, and Tidal Power Generation Device are studied. Finally, through a comparison with the classic experiment conducted by J&W, the accuracy of the simulation is validated. The research indicates that during single-direction vortex-induced vibrations, both the average value and the standard deviation of the drag coefficient of the oscillator first increase and then decrease. Lock-in occurs in the reduced velocity range of approximately 5.53 to 9.51. Compared to the flow around a cylindrical oscillator, the frequency ratio of single-direction vortex-induced vibrations increases with the reduced velocity and remains stable at approximately 1 within the lock-in range. When the flow velocity is selected within the lock-in range, the tail vortex mode for either single-direction or bidirectional vortex-induced vibrations changes from the 2S mode to the SS mode.

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ocean current energy / fluid structure interaction / vortex-induced vibration / vortex shedding mode / reduced velocity / numerical simulation

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Wang Jiazheng, Sun Hongyuan, Lin Haihua, Jiao Bo, Liu Dexin, Sun Guang. NUMERICAL STUDY ON VORTEX-INDUCED VIBRATIONS OF COMBINED WIND,WAVE, AND TIDAL POWER GENERATION DEVICE[J]. Acta Energiae Solaris Sinica. 2024, 45(11): 545-552 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1061

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