Wave power extraction from an oscillating water column at the tip of a breakwater
Wave power extraction from an oscillating water column at the tip of a breakwater
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DOI：
10.1017/s0022112009005990
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发表时间：
2009-05
影响因子：
3.7
通讯作者：
Hervé Martins-rivas;C. Mei
中科院分区：
文献类型：
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作者：
Hervé Martins-rivas;C. Mei
为了降低建造、运营、维护、储能和并网的成本，一些从海浪中提取能量的设备可能会安装在海岸上。本文从理论上研究了设置在细长防波堤堤顶的单个振荡水柱。然后用本征函数展开法和积分方程法求解了底部开口圆柱体的辐射和散射的线性化问题。由于薄防波堤是楔形体的极限，为了便于分析，本文导出了楔形体尖端实心圆柱绕射的精确解。继Sarmento & Falcão（J. Fluid Mech.，第150卷，1985年，第150页。467-485），通过在水面上方的腔室中包括空气压缩性来模拟威尔斯涡轮机的功率输出。研究了空气压缩性对萃取效率的影响。它示出，对于这个简单的几何形状的入射角影响的波的结构外，但不提取的功率。
To reduce the costs of construction, operation, maintenance, energy storage and grid connection, some devices for extracting energy from sea waves are likely to be installed on the coast. We study theoretically a single oscillating water column (OWC) installed at the tip of a long and thin breakwater. The linearized problems of radiation and scattering for a hollow cylinder with an open bottom are then solved by the usual method of eigenfunction expansions and integral equations. Since a thin breakwater is the limit of a wedge, an exact solution for the diffraction by a solid cylinder at the tip of a wedge is derived to facilitate the analysis. Following Sarmento & Falcão (J. Fluid Mech., vol. 150, 1985, pp. 467–485), power takeoff by Wells turbines is modelled by including air compressibility in the chamber above the water surface. The effects of air compressibility on the extraction efficiency is studied. It is shown that for this simple geometry the angle of incidence affects the waves outside the structure but not the extracted power.