Design And Hydrodynamic Performance Study Of Integrated Floating Breakwater And Wind Power Generation

Compared with fixed breakwater,floating breakwater has the advantages of low cost,effective prevention of water pollution and better adaptability to the environment,and can be applied to a wider deep sea.Wind resource is a renewable and clean energy,which plays an important role in saving resources and protecting the environment.Because wind power itself has the characteristics of small total investment,low cost and low pollution,people pay more and more attention to it.China has a long coastline of 18,000 kilometers.There are abundant wind resources in offshore areas.Marine wind power generation has unique condition.It is of great significance and value to design an integrated device of wind power generation and floating breakwater.Combining with the characteristics of applied sea area,the double cylindrical floating breakwater is selected as floating structure based on breakwater model design foundation,and the low-power wind turbine is selected as wind turbine.Combining the two characteristics,an integrated wind power generation device with floating breakwater is designed,and the numerical flume is established to study its wave absorption performance and motion response.The main research contents of this paper are as follows:(1)Through the analysis of the target sea area,the conditions of wave and wind speed are determined.The primary design of the main components is carried out and the related introduction is made.The main components are introduced.The working principle and advantages of the integrated device are analyzed.(2)CFD software is used to build numerical wave flume.Wave-making and wave-eliminating at the end of the flume are carried out according to boundary wave-making theory and damping wave-eliminating principle.VOF is used to capture gas-liquid two-phase flow.The accuracy of the simulation is verified by comparing the wave-making results with theoretical values.Two wave-making ways are compared and the optimal wave-making method is selected.(3)Based on STAR CCM+software,the transmission coefficient and motion response of single box floating breakwater are simulated by overlapping mesh generation technology,and the accuracy of the calculation method is verified by comparison with the experimental results.The hydrodynamic performance of the integrated cylindrical floating breakwater under different wave periods is studied by using the numerical calculation method,and the collected data are communicated.The transmission coefficient,reflection coefficient and motion response are obtained.(4)The hydrodynamic performance of the integrated device of wind power generation and floating breakwater is analyzed.By simulating the selected wind turbine working at rated power and testing the thrust of the fan structure,the numerical simulation of the floating breakwater under the action of thrust is carried out in different wave periods.The wave transmission coefficient,reflection coefficient and motion response of the integrated device are simplified and simulated by this method.The results are compared with those of the double cylindrical floating breakwater.