筏式波浪能消能装置水动力特性的研究

项目名称： 筏式波浪能消能装置水动力特性的研究

项目编号： No.51479092

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 水利工程

项目作者： 张永良

作者单位： 清华大学

项目金额： 84万元

中文摘要： 采用理论分析、数值模拟和试验研究相结合的方法，对波浪环境中筏式俘获波浪能消减波浪装置的水动力特性进行研究。基于紊流理论、非线性浮体结构运动理论和流体-结构动力相互作用理论，建立流体-多结构体-阻尼系统耦合的数学模型，揭示在复杂波流条件下筏式俘能消波装置的运行特性；研究波浪、波浪能俘获器和阻尼系统相互作用的机理，探索波浪要素、水流要素、阻尼特性和装置物理和几何特性对装置消能率、波浪透射率的影响规律；提出筏式俘能消波装置系统的优化理论，优化俘能消波装置；研究小比尺波浪能消能装置的工作性能，进一步揭示提高消能效率、降低波浪透射率和次声波的途径和方法。通过理论分析、数值仿真和小比例实海况试验等手段解决筏式俘能消波装置的关键技术问题，提高俘能消能效率和降低次声波，具有重要的科学意义和巨大的应用价值。

中文关键词： 波浪；筏式波浪能消能器；流体-结构相互作用；数值模拟；物理试验

英文摘要： The hydrodynamic behaviour of raft-type wave energy harvesting and wave reducing device is studied by using the combined method of theoretical analysis, numerical simulation and physical test. Based on turbulence theory, nonlinear floating structure motion theory and fluid-structure dynamic interaction, a mathematical model is established for the fluid-multiple structure-damper coupling system to reveal the dynamic behaviour of raft-type wave energy harvesting and wave reducing devices. The mechanism of interaction among waves, wave energy harvestor and damping system is investigated. Variation of wave energy dissipation efficiency, wave transmission rate and infrasound with wave parameters, current parameters, damping coefficients and device's parameters is explored. Optimization theory for the raft-type device is presented. Operational characteristics of small scale system is studied to reveal a way how to increase the efficiency of wave enrgy dissipation，to decrease wave transmission rate and infrasound level. Key problems for wave energy dissipation utilizing raft-type wave energy dissipators are solved by using the combined methods of theoretical analysis, numerical simulation and small scale model tests in order to increase wave energy dissipation rate and decrease infrasound level, this study has significant scientific importance and application.

英文关键词： wave;raft-type wave energy dissipation device;fluid-structure interaction;numerical simulation;physical test