| Floating breakwater is mainly used to prevent waves,to protect the structure in the port and the safety of ships when entering into or leaving the harbor.Compared with the traditional fixed breakwater,the floating breakwater has the advantages of simple structure,lightweight,low cost,small damage to the ecosystem,with no negative influence on seawater exchange or polluting the marine environment in the working sea area.There are over 18,000 kilometers of coastline and a great deal of islands in China.It is indispensable to be electrical sufficient when developing the potential of islands.Since most of the islands are far away from the mainland,it consumes a huge amount of cost to transport electricity to the islands straight from the mainland.If the island could rely on its own advantages and some floating structures outside to generate electricity,the electricity problem would be solved in a most effective way.Therefore,research on the integrated device of floating breakwater and wave power generation is of great importance in practice.Based on the test results of "Model Test of Floating Breakwater Unit Configurations" issued by the Ministry of Industry and Information Technology,this paper optimizes optimal floating breakwater structure—cylinder floating breakwater.Combining the Savonius rotor with wave power plant designed in this paper,this paper is aimed to research on its hydrodynamic performance,wave elimination effect and power generation efficiency.The main contents are as follows:1.Establish a viscous 2D numerical sink and verify simulation accuracy.RNG?-? turbulence model and VOF method are performed to calculate the gas-liquid two-phase flow.According to boundary wave principle and damping wave elimination principle.By STAR-CCM + software,establish a viscous 2D numerical sink.Values were compared to verify the accuracy of the numerical wave tank.2.A design proposal for an integrated installation of floating breakwaters and wave energy is proposed.Based on the analysis of the sea conditions in the target sea area,the wave conditions were determined.Based on the design concept that both wave and wave energy generation functions are combined,but the wave-reduction performance is dominant,the double-cylinder floating breakwater and the straight-vane Savonius rotor wave are optimized.Energy-generating device integrated design program.3.Numerical calculation of power generation performance and optimization of design parameters for straight-vane Savonius rotor wave energy device.The CFD method is used to study the performance of a shaft-rotating Savonius rotor in different submersion depths.The results are compared with the experimental data to verify the feasibility of the simulation software.And this method was used to study the different number of blades and different immersion depths on the performance of the Savonius rotor of the straight blade when the shaft was rotated.4.Numerical calculation and analysis means of double cylindrical floating breakwaters with a straight blade Savonius rotor integrated wave energy.The CFD method was used to numerically calculate the hydrodynamic response,wave attenuation performance,and power generation efficiency of an integrated device for floating breakwaters and wave power generation,and the calculation results were compared with the hydrodynamic performance of a single double-cylinder floating breakwater.The wave-removal effect was compared and analyzed,and the motion response,wave-eliminating effect,and power generation performance of the integrated device were obtained when the number of rotor blades was different and the initial immersion depth of the rotor was different. |
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