波能转换装置的聚波原理及其实现技术

The principle and realization technology of ocean wave focus on wave energy devices over complicated topography and in irregular waves are systematically studied in the project. Several two and three dimensional mathematical models have been established. Theoretic (analytical) solutions to the hydrodynamical coefficients (added masses and wave damping ) and wave forces of a two and three-dimensional single and dual buoy wave energy device over a simple topography and in regular waves are derived. A three dimensional boundary element method for wave energy devices over complicated topography and in regular waves has been constructed, and the hydrodynamical coefficients, wave damping and wave focusing effect of sole and dual buoy wave energy devices have been obtained by use of the numerical method. The construction of the state space model applied to the phase control, the method for the determination of the system matrix coefficients, the input method for the system input in random waves, and so on are studied. The motions of wave energy devices in regular and irregular waves ara analysised in time domain by use of the state space model and the new determination method for the system matrix coefficients. The self starting characteristics of the turbine in regular and irregular reciprocating flows are also studied. Moreover, a new type wave energy product for navigation buoys and a software for visulizing the wave focus over a complicated topography are developed..The project has important scientific significance in the establishment of the principle of wave focus in nonlinear and irregular waves and enriches the contents of the disciplines of ocean engineering and utilization of renewable energy. The study lays a good theorectical and technological foundations for the utilization of wave energy, and a good application perspective can be expected..

本项目研究波能装置在复杂地形上和不规则波浪作用下的聚波原理与方法，包括波能装置的运动与海底地形及岸线以及不规则波浪间的相互作用关系；地形及岸线改造聚波和波能装置运动相位控制聚波方法。研究可望大幅度提高波能装置的效率、降低成本，从而促进波能利用的实用化，有重要的应用价值，对新能源利用和工程海洋学的发展也有重要的科学意义。