RADIATION WAVE CHARACTERISTICS OF A SUBMERGED-POINT-ABSORBER WAVE ENERGY CONVERTER

Wu Jinming; Li Hengrui; Wang Jun; Ni Xijie; Yang Haojie; Peter D. Lund

doi:10.19912/j.0254-0096.tynxb.2024-2288

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 495-503. DOI: 10.19912/j.0254-0096.tynxb.2024-2288

RADIATION WAVE CHARACTERISTICS OF A SUBMERGED-POINT-ABSORBER WAVE ENERGY CONVERTER

Wu Jinming^1,2, Li Hengrui^1,2, Wang Jun¹, Ni Xijie^1,2, Yang Haojie³, Peter D. Lund^1,4

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Abstract

To reveal the characteristics of the free-surface wave caused by a submerged-point-absorber wave energy converter, the radiation wave characteristics of a submerged cylindrical floater undergoing heave oscillations were studied. The characteristic function expansion method was used to solve the radiation potential of the oscillating cylinder, and the influence of the shape, position and motion parameters of the floaters as well as the water depth on the radiation wave characteristics was investigated. The results indicate that a submerged cylindrical floater undergoing heave oscillation forms an axisymmetric circular radiation wave along the central axis of the floater on the free surface. The amplitude of the radiation wave reaches its maximum value directly above the floater and gradually decays in the direction away from the floater. As the distance between the upper surface of the floater and the free surface decreases, the maximum amplitude of the radiation wave increases, but the rate of attenuation along the direction away from the floater also increases. Compared to the significant increase in radiation wave amplitude caused by increasing the radius of the floater, increasing the height of the floaters and water depth did not significantly increase the amplitude of the radiation wave. As the heave period of the floating body increases, the amplitude of the radiated wave decreases. The phase difference between the radiation wave and the displacement of the floater mainly depends on the dimensionless distance from the floater, and is not significantly affected by the shape, position, motion parameters of the floaters as well as the water depth.

Key words

wave energy conversion / wave power / wave interface / characteristic function expansion method / potential flow / Bessel functions

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Wu Jinming, Li Hengrui, Wang Jun, Ni Xijie, Yang Haojie, Peter D. Lund. RADIATION WAVE CHARACTERISTICS OF A SUBMERGED-POINT-ABSORBER WAVE ENERGY CONVERTER[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 495-503 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2288

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