Array Investigation Of Tidal Current Energy Turbines For Mooring Platform

In order to better understand and manage the ocean,promote the construction of marine information,the development of marine instruments and the improvement of marine observation means are the most important methods.Mooring platform can be used to carry a variety of marine instruments,but due to the weak endurance of traditional power supply methods,finding a sustainable and stable energy supply has become an urgent problem to be solved in the promotion and use of marine instruments and the construction of marine information in China.The effective way to solve this problem is to develop and utilize marine energy resources according to local conditions in combination with the distribution of marine energy resources and local location advantages.In this study,tidal current energy is selected as the main energy supply mode of marine instrument equipment,the tidal current energy turbine array and mooring floating platform are designed in an integrated way,and the optimization of tidal current energy turbine array under multiple variables and factors is discussed to solve the power supply problem of marine instrument equipment carried on the mooring platformThe paper consists of six chapters.The first chapter introduces the background and significance of the research,summarizes the relevant research at home and abroad,and analyzes the research progress and current status of tidal energy power generation technology and tidal turbine array.In the second chapter,the theory involved in the performance study of hydraulic turbine is described and deduced,and it is pointed out that the research of wake effect is instructive for the arrangement of hydraulic turbine array;the geometric model parameters of hydraulic turbine are determined,and the geometric model of three blade turbine rotor is completed by using SolidWorks software through coordinate transformation.The third chapter gives an overview of the CFD method,including the choice of governing equations,turbulence models,boundary conditions,solver settings,the study of the wake structure changes and turbulence intensity of a single turbine,and the verification of the 3D mathematical model used.The results show that the numerical simulation and the measured data are in good agreement,which proves the reliability of the mathematical model.The fourth chapter studies the impact of array structure on the tidal power plant,and several sets of operating conditions are set up for tandem turbine units,parallel turbine units and interleaved turbine units respectively,and establishes a three-dimensional hydrodynamic mathematical model for simulation calculation.Discuss the influence of array structure parameters on the wake field of the unit array,determine the optimal unit spacing,and provide reference for the design of the subsequent arrangement of the turbine array.The fifth chapter studies the influence of floating platform column on tidal power plant.Based on the integrated design of mooring and floating platform,two schemes of turbine array arrangement are proposed.The three-dimensional hydrodynamic mathematical model of the interaction of tide,turbine array and mooring floating platform column is established.In the limited space at the bottom deck of the floating platform,the hydrodynamic performance of five fixed tide energy turbines with different array layout schemes is compared,and the structural change of the wake field,the loading condition of the blades and the power output under the influence of the interaction of the floating platform column and the unit array are analyzed characteristic.In Chapter 6,the hydrodynamic interference characteristics of turbine array are analyzed.In order to further optimize the performance of the tidal current power generation device,the influence of the yaw condition and the rotation direction of the turbine on the tidal current power generation field is studied,and the anti-interference ability of the array under different arrangement schemes is analyzed and compared,and the optimal layout scheme is obtained.The results show that the larger the yaw angle is,the more serious the loss of the output power of the turbine array is,and the anti-interference ability of scheme Ⅰ is obviously better than that of scheme Ⅱ;when the rotation direction of the adjacent turbines is opposite,the overall hydrodynamic performance of the array will be improved,and when the rotation direction of the adjacent turbines is opposite,the output power of the array will reach the maximum value of this study.The last chapter summarizes the whole paper,gives the main conclusions,puts forward the main innovation points of this study,and points out the shortcomings of the paper.