Fluid-solid Coupling Analysis Of Horizontal Axis Wave Energy Generator Based On Numerical Flume

With the depletion of fossil energy and increasingly serious environmental problems,clean energy has attracted more attention from all over the world.Wave energy,as one of the most potential clean energy sources,is of great significance to solving the problems caused by fossil energy.The purpose of this paper is to study the wave energy capture efficiency of horizontal axis wave power generation device based on actual sea conditions and the reliability of device structure in the two impact process.Firstly,the paper introduce the type and working principle of the wave energy generation device,as well as the research status at home and abroad.And give a detailed description of the rotor of the water turbine,which is the core component of the horizontal axis wave energy generation device.The main models of numerical water tank(NWT)and their respective advantages are introduced.Also the paper introduce their respective advantages.The free surface boundary conditions and wave models in the process of numerical wave formation are introduced,and the related methods and advantages of free surface monitoring are also introduced.Secondly,the NWT is established by using Fluent software,and the NWT is discrete.Through the monitoring of the time unit and the length unit,the distribution position of the wave with the change of the length of the tank is determined.And the position of the horizontal axis wave energy generation is determined.The monitoring of the wave height in the damping zone is studied.The influence of damping coefficient on wave attenuation is studied,and the reasonable wave attenuation coefficient of numerical tank is determined.Then the two-dimensional model of the horizontal axis wave energy generation containing the turbine rotor and the flow channel is set up.The device is placed in the NWT.And the motion model and interface setting are introduced.The speed and torque data of the model are extracted.the data are smoothed by Savitzky-Golay filtering.The characteristics of the horizontal axis wave energy generation in the two impact process are explained by the simulated density map and the torque curve.A horizontal axis wave energy generation with an involute and double circular arc is set up to compare the torque and wave energy capture efficiency.Find the best line type of the turbine.The research shows that the wave energy capture efficiency of the involute turbine is higher.The submerged depth of the device is another important factor affecting the wave energy capture efficiency.Through the establishment of an involute hydraulic turbine model with different submerged depths,the optimal submerged depth of the device is studied to find the optimal submerged depth of the device.Finally,the three-dimensional model of the horizontal axis wave energy generation is set up.The model is meshed and the boundary conditions are set.On the basis of the fluid simulation,the unidirectional fluid-solid coupling surface is set up.The pressure data of the fluid simulation is introduced into the three-dimensional model and the corresponding parts are applied to get the two shock fashion of the turbine.The deformation and stress cloud maps are set up to verify the reliability of the device under wave action.