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浙江大学学报(工学版)
浙江大学学报(工学版)  2022, Vol. 56 Issue (12): 2487-2495    DOI: 10.3785/j.issn.1008-973X.2022.12.018
土木工程、水利工程     
弹簧刚度对嵌入式振荡水柱波能装置水动力性能的影响
王品捷(),邓争志*(),赵西增
浙江大学 海洋学院，浙江 舟山 316021
Effects of spring stiffness on hydrodynamics of nested oscillating water column wave energy device
Pin-jie WANG(),Zheng-zhi DENG*(),Xi-zeng ZHAO
Ocean College, Zhejiang University, Zhoushan 316021, China
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摘要：

提出嵌入方箱式防波堤的垂荡式振荡水柱（OWC）波能装置，利用开源计算流体动力学库OpenFOAM及工具箱waves2foam，对该波能装置的能量转换效率和水动力特性开展数值研究. 采用流体体积法（VOF）捕捉气液界面，利用Rigid-Body Dynamic网格技术求解垂荡运动. 在不同入射波频下，探究垂直线性弹簧约束（用无量纲弹簧刚度表示）对OWC波能装置的波能转换效率、反射系数、透射系数、能量耗散系数、相对压降、有效相对振荡幅度和相位差等的影响. 结果表明，结构物适当的垂荡运动有利于提升OWC装置在特定频率条件下的波能转换效率；振荡水柱和结构物间的运动相位差是决定能量转换效率的关键因素；为了提升能量转换效率，调节结构物的垂荡运动来控制相位差的措施是可行的.
关键词： 波浪能;  OpenFOAM;  振荡水柱 (OWC);  波能转换效率;  方箱式防波堤    
Abstract:

A heave-only oscillating water column (OWC) wave energy device integrated in box-type breakwater was proposed. Using the open-source computational fluid dynamics platform OpenFOAM and toolbox waves2foam, the energy conversion efficiency and hydrodynamic properties of the wave energy device were investigated numerically. Fluid volume method (VOF) was used to capture gas-liquid interface and Rigid-Body Dynamic grid technology was employed to solve the heave motion. The effects of vertical linear spring restraints (expressed by dimensionless spring stiffness) on the wave energy conversion efficiency, reflection coefficient, transmission coefficient, energy dissipation coefficient, relative pressure drop, effective relative oscillation amplitude and phase difference of the OWC wave energy device under different incident wave frequencies were explored. Results show that the proper heave motion of the structure is conducive to improving the wave energy conversion efficiency of the OWC device at a specific frequency range. The motion phase difference between the oscillating water column and the structure is the key factor to determine the energy conversion efficiency. It is feasible to improve the wave energy conversion efficiency by controlling the phase difference with adjusting the heave motion of the structure.
Key words: wave energy    OpenFOAM    oscillation water column (OWC)    wave energy conversion efficiency    box-type breakwater
收稿日期: 2021-12-22 出版日期: 2023-01-03
CLC:  P 743.2  
基金资助: 浙江省自然科学基金-水利联合基金重大项目（LZJWD22E090002）
通讯作者: 邓争志     E-mail: opinkwang@foxmail.com;zzdeng@zju.edu.cn
作者简介: 王品捷（1997—），女，硕士生，从事水动力学研究. orcid.org/0000-0002-5823-8826. E-mail： opinkwang@foxmail.com
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引用本文:

王品捷,邓争志,赵西增. 弹簧刚度对嵌入式振荡水柱波能装置水动力性能的影响[J]. 浙江大学学报(工学版), 2022, 56(12): 2487-2495.

Pin-jie WANG,Zheng-zhi DENG,Xi-zeng ZHAO. Effects of spring stiffness on hydrodynamics of nested oscillating water column wave energy device. Journal of ZheJiang University (Engineering Science), 2022, 56(12): 2487-2495.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2022.12.018    或    https://www.zjujournals.com/eng/CN/Y2022/V56/I12/2487

图 1  垂荡式振荡水柱装置数值波浪水槽示意图
图 2  3种离散方案的网格示意图
图 3  不同网格下气室内液面高度与压强的数值收敛性结果
图 4  圆柱体运动位移与质心高度的比值随无量纲时间参数的变化
图 5  方箱振荡幅度与入射波幅的比值随无量纲频率参数的变化
图 6  不同求解器下的波能转换效率对比
图 7  无量纲弹簧刚度对能量转换效率的影响
图 8  无量纲弹簧刚度对反射系数的影响
图 9  无量纲弹簧刚度对透射系数的影响
图 10  无量纲弹簧刚度对能量耗散系数的影响
图 11  无量纲弹簧刚度对压降的影响
图 12  无量纲弹簧刚度对不同相对振幅的影响
图 13  无量纲弹簧刚度对相位差绝对值的影响
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