A new L type floating breakwater derived from vortex dissipation simulation

摘要

During the hydrodynamic analysis of the incident wave with the floating breakwater, the viscous effect for example the vortex generation and the energy dissipation is one of the issues, which affects the proper estimation of the wave protection performance. Traditional potential flow simulation is unable to solve the vortex dissipation. In this paper, the viscous flow simulation of wave-body interactions is carried out for a rectangular and inverted 35 type fixed floating breakwater (FB). The numerical accuracy of the viscous model is confirmed by comparison of the wave transmission and reflection coefficients between the viscous flow, potential flow, and experimental results. Furthermore, the vorticity field on these two types of FB are discussed and compared respectively, further, the characteristics like the vortex evolution, the flow pattern and the vorticity magnitude around the inverted n type fixed FB is analyzed in detail. Finally, an L type floating breakwater is designed and the sensitivity analysis of the principle dimensions on its wave protection property is performed. It has been demonstrated that L type floating breakwater has better comprehensive performance than rectangular and inverted rr type floating breakwater under the same length of the protruding plate.