EFFECT OF INCIDENCE ANGLE ON VORTEX DYNAMICS AND HYDRODYNAMIC ENERGY CAPTURE OF VORTEX&#x000ad;INDUCED VIBRATION OF THREE&#x000ad;CYLINDER OSCILLATOR

Ren Xia; Luo Zhumei; Yu Fengrong; Liang Han; Li Ye

doi:10.19912/j.0254-0096.tynxb.2024-1675

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 738-746. DOI: 10.19912/j.0254-0096.tynxb.2024-1675

EFFECT OF INCIDENCE ANGLE ON VORTEX DYNAMICS AND HYDRODYNAMIC ENERGY CAPTURE OF VORTEXINDUCED VIBRATION OF THREECYLINDER OSCILLATOR

Ren Xia, Luo Zhumei, Yu Fengrong, Liang Han, Li Ye

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Abstract

This study takes the three-cylinder oscillator with rigid connection as an energy harvester, which is arranged in an equilateral triangle. The influence of different water flow incident angles α=0°, 45°, 90°, 135° and 180° on the hydrodynamic response and low-velocity hydrokinetic energy capture of the energy harvester is studied by two-way fluid-structure interaction （FSI） numerical method. The results show that the incidence angle significantly affects the dynamic response and lock-in range of the three-cylinder oscillators. There is no lower branch in amplitude response at α0° and α135°, while the lock-in range is widest at α0° and narrowest at α=45° and α180°. The vortex of the three-cylinder oscillator at each incidence angle in the initial branch shows “2S” patterns, and show different vortex-shedding patterns such as “P+S”, “T”, “2P” and others in the upper and lower branches. When the incident angles are parallel （i.e., α0° and α180°） or perpendicular to the incoming flow direction （α90°）, the three-cylinder oscillators have higher energy capture performance. The incidence angle α0° is the most suitable angle for energy harvesting. It is followed by α180°and α90°. Considering the energy conversion efficiency, α0° at U_r=9 is the best chice.

Key words

ocean energy / energy capture structure / vortex-induced vibration / fluid-structure interaction / energy capture characteristics / three-cylinder

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Ren Xia, Luo Zhumei, Yu Fengrong, Liang Han, Li Ye. EFFECT OF INCIDENCE ANGLE ON VORTEX DYNAMICS AND HYDRODYNAMIC ENERGY CAPTURE OF VORTEXINDUCED VIBRATION OF THREECYLINDER OSCILLATOR[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 738-746 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1675

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