Wave power extraction from a U-shaped oscillating water column consisting of a flexible bottom-standing front wall

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2025-05-03 DOI:10.1016/j.renene.2025.123173

Siming Zheng , Haojie Zheng , Simone Michele , Guixun Zhu , Yeaw Chu Lee , Deborah Greaves

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引用次数: 0

Abstract

In this paper, the concept of a U-shaped oscillating water column (UOWC) device consisting of a flexible bottom-standing front wall is proposed. The deflection of the flexible wall could bring benefits for wave power absorption. To evaluate the hydrodynamic performance and predict the wave power absorption of the flexible UOWC, a theoretical model based on the linear potential flow theory and the Galerkin approximation method is developed. For some examined flexible UOWCs, three peaks of the frequency response of the maximum wave power capture efficiency are observed, in which two are related to the resonant frequencies of the oscillating water column and the 1st natural mode of the flexible wall, respectively, and one could be related to wave near-trapping. The flexural rigidity of the flexible bottom-standing front wall is found to be a key factor affecting the performance of the device. As the dimensionless flexural rigidity increases, the three peaks of the efficiency-wave frequency curve move toward large frequencies and a large bandwidth of high efficiency is achieved.

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从一个u形振荡水柱中提取波浪能量，该水柱由一个灵活的底立前墙组成

本文提出了一种由柔性立底前壁组成的u形振荡水柱装置的概念。柔性壁面的挠度有利于吸收波浪能。为了评价柔性水下接触网的水动力性能和预测其波能吸收，建立了基于线性势流理论和伽辽金近似方法的理论模型。对于一些测试的柔性UOWCs，观察到最大波能捕获效率的频率响应有三个峰值，其中两个分别与振荡水柱和柔性壁面第一自然模态的谐振频率有关，另一个可能与波近捕获有关。研究发现，柔性立底前壁的抗弯刚度是影响装置性能的关键因素。随着无量纲抗弯刚度的增大，效率-波频率曲线的三个峰值向大频率方向移动，实现了高效率的大带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.