不规则波作用下岸基式振荡水柱波能装置的水动力性能研究

傅磊; 宁德志; 王荣泉; RobertMayon

doi:10.12284/hyxb2024005

不规则波作用下岸基式振荡水柱波能装置的水动力性能研究

doi: 10.12284/hyxb2024005

傅磊^{1, 2,},
宁德志^{1, 2},
王荣泉^{1, 2, ,},
RobertMayon^{1, 2}

1.
大连理工大学海岸和近海工程国家重点实验室，辽宁大连 116024
2.
大连理工大学大连市海洋可再生能源重点实验室，辽宁大连 116024

基金项目: 国家自然科学基金项目（52271260, 52001054）；辽宁省兴辽英才计划项目（XLYC2002033）；中央高校基本科研业务费资助项目（DUT23RC(3)017）。

详细信息

作者简介:
傅磊（1999—），男，江苏省镇江市人，从事波浪能高效利用研究。E-mail：fulei@mail.dlut.edu.cn

通讯作者:
王荣泉（1989—），男，湖南省邵阳市人，主要从事波浪能开发与利用研究。E-mail: rqwang@dlut.edu.cn

中图分类号: P731.22
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- 被引次数: 0
出版历程
- 收稿日期: 2023-10-18
- 修回日期: 2023-12-21
- 网络出版日期: 2024-04-15
- 刊出日期: 2024-01-01

Hydrodynamic performance study of a land-based OWC under the action of irregular wave

Fu Lei^{1, 2
,},
Ning Dezhi^{1, 2},
Wang Rongquan^{1, 2
, ,},
Robert Mayon^{1, 2}

1.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2.
Dalian Key Laboratory of Offshore Renewable Energy, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 为了研究真实海域中振荡水柱（OWC）波能转换装置的水动力性能，本文基于势流理论和高阶边界元方法，建立了不规则波与岸基式OWC波能装置相互作用的二维非线性数值模型，不规则波基于JONSWAP谱生成。为了考虑由于水体黏性引起的能量耗散，在气室内水面边界条件中引入人工黏性阻尼。并在大连理工大学波流水槽中开展了物理模型试验，对数值模型的有效性进行了验证。研究发现，在不规则波作用下，OWC波能装置的水动力效率相较于规则波作用下有所降低，特别是在低频波区域效率差值最大。与规则波相比，不规则波浪作用下装置峰值效率对应的频率变大。气室内的相对水面高程随着有效波高的增加而降低，而气室内相对气压则随有效波高的增加而增大。OWC波能装置的水动力效率受有效波高的影响较小，其峰值效率对应的频率不受波浪非线性的影响。本文可以为OWC波能装置的设计提供参考。
- 振荡水柱 /
- 波能转换装置 /
- 不规则波 /
- 高阶边界元 /
- 波浪非线性
Abstract: To study the hydrodynamic performance of an oscillating-water-column (OWC) wave energy converter in a real sea, a two-dimensional nonlinear numerical model of the interaction between irregular waves and a land-based OWC device is developed based on the potential flow theory and the high-order boundary element method (HOBEM) in this paper. The irregular waves are generated based on the JONSWAP spectrum. The viscous damping is introduced on the water surface boundary conditions inside the air chamber to consider the energy dissipation due to water viscosity. And physical modeling experiments are carried out in the wave-current flume at Dalian University of Technology to validate the numerical model. It is found that the OWC hydrodynamic efficiency under irregular waves is reduced in comparison with that under regular waves, especially in the low-frequency wave region where the efficiency difference is the largest. The frequency corresponding to the peak efficiency under the action of irregular waves is larger than that under regular waves. The dimensionless surface elevation inside the chamber decreases, while the dimensionless air pressure inside the chamber increases with the significant wave heights. The OWC hydrodynamic efficiency is less affected by the significant wave height. The frequency corresponding to the peak efficiency is not dependent on wave nonlinearity. This work can provide a reference for the design of OWCs.
- oscillating water column /
- wave energy converter /
- irregular wave /
- higher-order boundary element /
- wave nonlinearity

HTML全文

图 1 数值水槽示意图

Fig. 1 Sketch of the numerical flume

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图 2 水槽试验模型布置

Fig. 2 The OWC device and the sketch of experimental set-up

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图 3 自由液面（a）和气体压强（b）的试验数据重复性对比

Fig. 3 Comparison of experimental repeatability of free surface (a) and air pressure (b)

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图 4 数值水槽网格划分示意图

Fig. 4 Sketch of the meshes of the numerical wave flume

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图 5 预测的转换效率和试验结果对比

Fig. 5 Comparison of predicted hydrodynamic efficiency and experimental results

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图 6 数值预测与试验中波能谱（a）和压强谱（b）对比

Fig. 6 Comparison of the wave energy spectrums (a) and the air pressure spectrums (b) between numerical with experiments

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图 7 不同峰值周期下气室内液面高程（a）和气体压强（b）的时域曲线

Fig. 7 Time-domain series of the surface elevation (a) and air pressure (b) for different peak periods

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图 8 气室内液面高程（a）和气体压强（b）随k_ph的特征统计值变化

Fig. 8 Variations of the surface elevation (a) and air pressure (b) with k_ph for characteristic statistics

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图 9 规则波和不规则波场景下OWC装置效率的比较

Fig. 9 Comparison of hydrodynamic efficiency of the OWC under regular and irregular wave scenarios

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图 10 入射波、气室外侧和气室中点波面的波能谱

Fig. 10 The wave energy spectrums of incident wave, surface elevation at outside and mid-point of the chamber

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图 11 不同有效波高下自由表面高程（a）和气体压强（b）随k_ph的变化

Fig. 11 Variations of the free-surface elevations (a) and air pressures (b) with k_ph for different significant wave heights

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图 12 T_p = 1.9 s时气室内液面的谱分析

Fig. 12 Spectral analysis of surface inside the chamber at T_p = 1.9 s

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图 13 不同有效波高下OWC效率随k_ph的变化

Fig. 13 Variations of the OWC efficiency with k_ph for different significant wave heights

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表 1 物理装置的具体设计参数

Tab. 1 The specific design dimensions of the physical devices

结构参数	尺寸/m
前墙吃水d	0.125
气室宽度b	0.7
前墙厚度w	0.05
圆孔直径 D	0.067
气室高度h_a	0.2

下载: 导出CSV

表 2 规则波与不规则波的波浪条件

Tab. 2 Wave conditions of regular and irregular waves

规则波		与规则波同波浪参数的不规则波1		与规则波同单宽波功率的不规则波2
T/s	H/m	T_p/s	H_s/m	T_p/s	H_s/m
1.4	0.06	1.4	0.06	1.4	0.087 2
1.5	0.06	1.5	0.06	1.5	0.087 5
1.6	0.06	1.6	0.06	1.6	0.087 7
1.7	0.06	1.7	0.06	1.7	0.087 9
1.8	0.06	1.8	0.06	1.8	0.088 0
1.9	0.06	1.9	0.06	1.9	0.088 0
2.0	0.06	2.0	0.06	2.0	0.087 9
2.1	0.06	2.1	0.06	2.1	0.087 8

下载: 导出CSV

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