Study On Wave Energy Capturing Device Mounted On Floating Breakwater

With the increasing shortage of natural oil resources and fishery resources in the world,the development of marine renewable energy and marine aquaculture has been strengthened.The ocean has high energy density and abundant reserves,but its development and utilization are still in the exploration stage.The development of Marine aquaculture technology is relatively mature,but the profound marine aquaculture equipment technology,which is both reliable and economical,is relatively backward.Therefore,it is of great theoretical significance and practical value to carry out the research on the anti-wave technology of Marine aquaculture equipment and the integrated application of the technology of wave energy capture and conversion.In order to satisfy the needs of the aquaculture equipment in Xiangshan sea area of the East China Sea to resist typhoon damage,this paper proposes an integrated design scheme which configures the Savonius type(S-type)rotor on the floating breakwater.The S-type rotor can be used to capture wave energy and convert it into electric energy further,which can improve the wave dissipation and flow reduction performance of breakwater and provide anti-wind barrier for breeding equipment.At the same time,S-type rotor provides green energy for the operation of breeding equipment.In this paper,the method of numerical simulation and experimental research weweis used to study the integrated device of floating breakwater and S-type rotor array,and the results with great reference value are obtained.In this paper,the boundary wave generation and damping wave elimination methods are used to establish a two-dimensional numerical wave flume based on the Realizable k-? turbulence model and the VOF two-phase flow model,which provides basic conditions for subsequent numerical simulation research.Besides,the dynamic model of breakwater is established,and the influence of structural parameters of breakwater on its wave dissipation characteristics is simulated in two-dimensional numerical wave flume.Then,an S-type rotor with a shrapnel valve structure is proposed,and the rotor dynamics model is established.Next,the influence of parameters is studied such as rotor overlap rate,relative water depth and spring valve opening rate on the rotor dynamics performance in a two-dimensional numerical wave flume.In order to solve the problem of low energy capture coefficient of a single rotor,this paper proposes a scheme of S-type rotor arranged on floating breakwater according to array,and studies the influence of vortex street generated by rotor rotation on the flow parameters of wake field,the influence of vortex street on the dynamic performance of downstream rotor under different flow velocities,and the influence of rotor spacing on the dynamic performance of rotor.According to the similarity criterion,the physical model of floating breakwater and rotor is made.Using the same wave current parameters as the above numerical simulation analysis,an experimental test of the physical model of the floating breakwater and S-type rotor is carried out in the laboratory's existing wave-making pool.The experimental results verify the feasibility of the proposed scheme,the correctness of the established dynamic model and the effectiveness of the simulation analysis method.