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Fully Nonlinear Time Domain Analysis for Hydrodynamic Performance of An oscillating wave surge converter

China Ocean Engineering 2018年第5期32卷 582-592页

作者： SUN Shi-yan SUN Shi-li WU Guo-xiong School of Naval Architecture & Ocean Engineering Jiangsu University of Science and Technology College of Shipbuilding Engineering Harbin Engineering University Department of Mechanical Engineering University College London

The hydrodynamic behaviour of an oscillating wave surge converter(OWSC) in large motion excited by nonlinear waves is investigated. The mechanism through which the wave energy is absorbed in the nonlinear system is analysed. The mathematical model used is based on the velocity potential theory together with the fully nonlinear boundary conditions on the moving body surface and deforming free surface. The problem is solved by the boundary element method. Numerical results are obtained to show how to adjust the mechanical properties of the OWSC to achieve the best efficiency in a given wave, together with the nonlinear effect of the wave height. Numerical results are also provided to show the behaviour of a given OWSC in waves of different frequencies and different heights.

关键词： wave energy oscillating wave surge converter nonlinear wave/structure interactions boundary element method

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Will oscillating wave surge converters survive tsunamis?

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Theoretical & Applied Mechanics Letters 2015年第4期5卷 160-166页

作者： L.O'Brien P.Christodoulides E.Renzi T.Stefanakis F.Dias School of Mathematical Sciences Monash University Faculty of Engineering and Technology Cyprus University of Technology School of Mathematical Sciences University College Dublin Department of Mathematical Sciences Loughborough University Centre de Mathématiques et de Leurs Applications (CMLA) Ecole Normale Supérieure de Cachan

With an increasing emphasis on renewable energy resources, wave power technology is becoming one of the realistic solutions. However, the 2011 tsunami in Japan was a harsh reminder of the ferocity of the ocean. It is known that tsunamis are nearly undetectable in the open ocean but as the wave approaches the shore its energy is compressed, creating large destructive waves. The question posed here is whether an oscillating wave surge converter （OWSC） could withstand the force of an incoming tsunami. Several tools are used to provide an answer： an analytical 3D model developed within the framework of linear theory, a numerical model based on the non-linear shallow water equations and empirical formulas. Numerical results show that run-up and draw-down can be amplified under some circumstances, leading to an OWSC lying on dry ground t

关键词： Tsunami wave energy converter wave loading oscillating wave surge converter wave-structure interaction

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wave Slamming on An OWSC wave Energy converter in Coupled wave-Current Conditions with Variable-Depth Seabed

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China Ocean Engineering 2021年第5期35卷 646-661页

作者： CHENG Yong JI Chun-yan YUAN Zhi-ming Atilla INCECIK School of naval architecture and ocean engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Naval Architecture Ocean and Marine Engineering DepartmentUniversity of StrathclydeGlasgowUnited Kingdom

Coastal wave energy resources have enormous exploitation potential due to shorter weather window,closer installation distance and lower maintenance ***,impact loads generated by depth variation from offshore to nearshore and wave-current interaction,may lead to a catastrophic damage or complete destruction to wave energy converters(WECs).This objective of this paper is to investigate slamming response of a coastal oscillating wave surge converter(OWSC)entering or leaving water *** on fully nonlinear potential flow theory,a time-domain wave-current-structure interaction model combined with higher-order boundary element method(HOBEM),is developed to analyze the coupled hydrodynamic *** variable-depth seabed is considered in the model to illustrate the shallow water effect on impact loads and free surface profiles in coastal zone.A domain decomposition approach is utilized to simulate the overlapping phenomenon generated by a jet falling into water under gravity *** a series of Lagrangian interpolation methods,the meshes on boundaries are rearranged to avoid the mismatch between element size on free surface and body *** present model is validated against the existing experimental and numerical *** are also provided for the effects of wave-current interaction and uneven local seabed on the slamming *** is found that the length of the splash jet increases for a following current and decreases for an opposing current,and that the slamming response of the OWSC device is sensitive to the geometric features of the uneven seabed.

关键词： wave-current interaction oscillating wave surge converter fully nonlinear potential flow theory slamming response higher-order boundary element method

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