集成于方箱防波堤的双气室振荡水柱波能装置转换效率研究  

A study on the wave power extraction efficiency of the dual-chamber OWC converter integrated into a rectangular breakwater

作　　者：郭权势 邓争志 万占鸿[2] GUO Quanshi;DENG Zhengzhi;WAN Zhanhong(Hunan Provincial Key Laboratory of Key Technology on Hydropower Development, Changsha 410014, China;Ocean College, Zhejiang University, Zhoushan 316021, China)

机构地区：[1]水能资源利用关键技术湖南省重点实验室,湖南长沙410014 [2]浙江大学海洋学院,浙江舟山316021

出　　处：《海洋工程》2022年第2期106-117,共12页The Ocean Engineering

摘　　要：为实现建造、运行和维护等方面的资源共享,将振荡水柱(oscillating water column,简称OWC)波能转换装置与现有海工结构集成耦合,已成为目前海洋波浪能转换利用的热点问题。以集成于方箱防波堤的双气室OWC装置为研究对象,借助开源代码平台OpenFOAM和造/消波工具箱waves2Foam,采用流体体积法(VOF)捕捉自由面和6自由度(6DOF)动网格求解器模拟垂荡运动响应,对在不同规则波作用下,中墙相对宽度、中墙相对吃水对装置波能转换效率及水动力特性的影响进行数值研究。结果表明,较大的中墙相对宽度能够增强装置的波能转换效率(ξ_(total)(max)=73%)、降低结构物的相对垂荡位移并对装置前后气室内水柱的振荡幅度与压强变化产生影响;增加中墙相对吃水能显著提高气室在中高频波段波能提取效率(ξ_(total)(max)=78%),并显著拓宽气室的高效频率带宽(0.9≤ω^(2)h/g≤2.2)。To share the cost of construction,operation and maintenance,coupling the oscillating water column wave energy conversion(OWC)device with the existing marine structures has been the focus of attention worldwide.A heave-only dual-chamber OWC breakwater system was numerically investigated by a well-developed open source software OpenFOAM coupled with a wave generation and absorption toolbox waves2Foam.The volume of fluid(VOF)method tracking the water-air interface and the six-degree-freedom(6DOF)Dynamic Mesh solver duplicating the heave motion of the OWC device were employed to examine the influences of the relative width and the draft depth of the central box on the wave energy conversion efficiency and hydrodynamic characteristics of the device under the actions of different incident regular waves.The results show the large breadth can enhance the wave energy conversion efficiency(ξ_(total)(max)=73%)of the device,reduce the heave amplitude of the device,and consequently affect the oscillation amplitude of pressure and water column in the chambers.Increasing the draft of the central box can significantly improve the wave energy extraction efficiency(ξ_(total)(max)=78%)within the medium and high frequency band,and considerably widen the high efficient bandwidth(0.9≤w^(2)h/g≤2.2).

关 键 词：波浪能 振荡水柱 水波动力学 波能转换效率 动网格 

分 类 号：O353[理学—流体力学]