摘要
基于成本共享理念的波浪能发电装置(WEC)的开发与设计为降低建设成本提供了新的研究思路,应用计算流体力学方法对在透空箱式防波堤前附加垂荡浮子的集成装置进行数值模拟研究,主要研究了流体黏性和非线性PTO系统以及浮子形状对此类集成装置能量转换效率的影响。结果表明,此类集成装置可以获得较高的波能捕获宽度比(CWR),最高可达0.7,可以较好地利用反射波波能。共振区间上受黏性影响较大,相比于线性无黏理论解,CWR下降明显;实现了2种非线性PTO系统的模拟,有待于进一步的优化未获得更高的CWR值;浮子形状优化效果明显,采用圆底形浮子受黏性影响更小,可以获得更大的CWR值。此种集成模型的模拟和研究可以为新型防波堤设计和现有防波堤的改造提供思路和参考。
The design and development of wave energy converter devices(WEC)based on the concept of cost-share have provided a new research idea for reducing the construction cost.In this paper,an integrated device constructed by adding floating floaters in front of a permeable box breakwater is numerically simulated by means of computational fluid dynamic method(CFD),and the fluid viscosity,the nonlinear PTO system and the influence of the floater shape on the wave energy conversion efficiency of this device are studied.The results show that this kind of integrated device can obtain higher wave energy capture width ratio(CWR),with the highest one being 0.7,indicating that the energy of the reflective waves can be utilized better.At the resonance interval,the affection of the fluid viscosity is great so that the CWR goes down significantly,compared with the linear inviscid theoretical solution.Two types of nonlinear PTO systems are simulated in the study,but further optimal work is needed in order to obtain higher CWR values.The effect of the floater shape optimization is obvious.Higher CWR values can be obtained when floaters with a round bottom are adopted,because of small affection of fluid viscosity.This study can provide a reference for designing new breakwaters and/or reforming the existing breakwaters.
作者
毛艳军
马小舟
MAO Yan-jun;MA Xiao-zhou(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China)
出处
《海岸工程》
2020年第1期44-52,共9页
Coastal Engineering
基金
国家重点研发计划项目——海洋环境安全保障-海洋工程动力环境精细化预报与安全保障及评估技术研究(2017YFC 1404200)。
