| Ocean is rich in energy,and huge energy is contained in waves.How to use ocean resources has been a research hotspot for a long time.In the work of double pontoon floating breakwater,it is found that in the enclosed cavity between two cylinders,the wave periodically vibrates up and down violently,which is similar to the movement of the fluid in the moon pool of offshore platform,so it is called the moon pool effect phenomenon of floating breakwater,which provides a new idea for wave energy conversion.Based on this,the numerical simulation method of the hydrodynamic response of the floating breakwater with moon pool is established,and the influence of the moon pool effect on the wave attenuation is discussed.On this basis,an integrated device of oscillating floater and floating breakwater is put forward,which can generate electricity by wave oscillating energy in the chamber while preventing and eliminating waves.It can provide safe working environment and clean energy for coastal and island residents.In this paper,taking the South China Sea as an example,based on CFD technology and numerical flume theory,the hydrodynamic performance,wave attenuation performance and power generation performance of the integrated device are calculated.On this basis,the configuration is optimized and analyzed.The main contents of this paper are as follows:1.Based on the viscosity theory,the numerical simulation method of flume is established,and the calculated value is compared with the theoretical value.The results show that the numerical flume method can simulate the wave with high precision.2.Based on the theory of two-dimensional numerical flume,a numerical simulation method of hydrodynamic response of floating breakwater with partial opening cavity structure under the combined action of internal and external flow fields is established.Through numerical flume simulation,the variation law of the moon pool effect in the cavity of floating breakwater and its influence on the wave attenuation effect and hydrodynamic performance are discussed.Through comparative analysis of test data,the numerical calculation accuracy is verified Accuracy.3.A design method of vertical guide pile type floating breakwater is put forward,which uses the moon pool effect to improve the wave attenuation effect.The response characteristics and rules of moon pool effect in the cavity of two kinds of floating breakwater are studied,and the influence on the wave attenuation performance and hydrodynamic performance of floating breakwater is compared and analyzed.4.Combining the moon pool effect and wave energy power generation,a design scheme of wave energy power generation and breakwater integration device is given.The influence of different configuration and design parameters of the oscillating floater on the hydrodynamic performance,wave elimination performance and power generation performance of the integrated device is analyzed numerically,and the relevant characteristics and rules are given.5.According to the numerical calculation results,the performance of single cavity single float and double cavity double float integrated device is compared and analyzed.Through the comparative analysis,the double cavity double float integrated device is selected as the optimal scheme,and the optimized design parameters and the hydrodynamic performance,wave elimination performance and power generation performance of the optimized integrated device are further given. |
