相交圆柱摆式波能装置俘获效率数值分析

摆式波能装置具有结构简单和转化效率高等特点，本文应用AQWA 软件基于势流理论对相交圆柱摆式波能装置进行了数值模拟研究，分析了轴间距比、结构阻尼、净浮力比、水深、波浪特性及吃水深度等主要参数对相交圆柱摆式波能装置俘获效率的影响，并与直板摆式波能装置的俘获效率进行了对比。结果表明：同样条件下，相交圆柱摆式波能装置往往比直板摆式波能装置的俘获效率更高；在研究范围内，轴间距比越大俘获效率越高；潮汐导致的水深变化对底铰摆式波能装置的俘获效率具有明显的影响，在工程应用中应采取适当的措施进行处理。

Numerical Analysis on Efficiency of a Parallel-Intersecting-Cylinder Flap Wave Energy Converter

The flap-type wave energy converters have attracted more attentions for its structural simplicity and high capture efficiency. In this paper, a kind of parallel-intersecting-cylinder flap wave energy converters was studied using AQWA based on the potential flow theory. The capture efficiency of the parallel-intersecting-cylinder flap converters was investigated by changing space ratio of the cylinders, structural damping, net buoyancy ratio, water depth, wave height, draft depth and tidal level, which was compared with plate flap converters as well. The results show that the performance of the parallel-intersecting-cylinder flap converters is generally better than that of the plate flap one. Capture efficiency of the converter increase as the space ratio of the cylinders within the scope of this paper. The change of water depth caused by the tide has a significant impact on the capture efficiency, which should be considered carefully in practical application.