Study On The Coupling Mechanism Of Wave Capture-wave Suppression-robustness Of Savonius Blade With Flexible Opening Valve

In recent years,China has gradually attached importance to marine resources.Building marine ecological pastures and building a ‘blue granary’ has become an important part of the national maritime power strategy.However,in the construction of marine ecological pastures,excessive wind and waves can easily cause the farmed fish to get scratched by touching the net.Even worse,excessive wind and waves also can easily cause damage of marine facilities such as cages and platforms.As a result,how to improve and guarantee the safety of marine facilities is an urgent problem to be solved.Based on the advantages of Savonius rotor,such as relatively simple structure,high reliability and stable speed,this paper constructs a floating breakwater system with Savonius rotor array as the main body.Then this paper studies the power generation,wave suppression and robustness of Savonius rotor.On the one hand,the structure of one-way opening valve is designed,and the hydrodynamic models of Savonius rotor with different blade profiles are constructed.Numerical simulation and experiment are used to improve the wave capture efficiency of Savonius rotor.On the other hand,the anti-wave performance of Savonius rotor is improved by coupling wave capture conversion with wave dissipation.The wave adaptability and anti-impact performance of Savonius rotor are studied to improve the robustness performance of the breakwater system.In this paper,the realizable k-ε turbulence model is used to establish a twodimensional numerical wave-flow flume.Then the wave-flow flume in the laboratory is used for experimental test,which provide the basic conditions for the subsequent numerical simulation and experimental research.In order to improve the energy capture efficiency of Savonius rotor,Savonius rotor with a one-way opening valve is proposed in this paper.A three-dimensional numerical model of the rotor is established to study the influence of opening ratio and curvature of blade on the performance of the turbine and the flow reduction effect.Secondly,according to the actual sea conditions,the coupling mechanism of wave capture and wave dissipation performance of Savonius turbines with different blade shapes is studied.Numerical simulation method is used to study the influence of each blade shape on Savonius rotor speed,wave capture performance and wave suppression effect under different working conditions in a two-dimensional numerical wave flume.Using the same wave-making parameters as the above numerical simulation analysis,the experimental test of Savonius rotor physical model is carried out in the laboratory wave-flow tank.Finally,the energy distribution model among the wave capture conversion,wave dissipation and anchor dissipation is established.The coupling mechanism among the wave power generation,wave attenuation performance and robustness of the Savonius rotor is analyzed by using the laboratory wave making tank and the experimental platform.Through the research of this paper,it is expected that the anti-wave performance of breakwater can be effectively improved through the design of flexible Savonius rotor with a one-way opening valve,and the relevant theoretical basis and technical support can be provided.