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张崇伟
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副教授   博士生导师   硕士生导师

性别: 男

毕业院校: 英国伦敦大学学院

学位: 博士

所在单位: 水利工程系

办公地点: 海岸和近海工程国家重点实验室

联系方式: 84708520转8403

电子邮箱: chongweizhang@dlut.edu.cn

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Numerical Investigation on Hydrodynamic Performance of an OWC Wave Energy Device in the Stepped Bottom

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论文类型: 期刊论文

第一作者: Ning, De-Zhi

通讯作者: Ke, Song,Mayon, Robert,张崇伟

发表时间: 2021-03-11

发表刊物: FRONTIERS IN ENERGY RESEARCH

卷号: 7

ISSN号: 2296-598X

关键字: oscillating water column; efficiency; stepped bottom; optimization; numerical simulation

摘要: The efficiency response of an oscillating water column (OWC) wave energy converter is analyzed by adopting a numerical approach and using various stepped bottom configurations for the seabed. A two-dimensional, fully non-linear higher-order boundary element method (HOBEM) model is developed to simulate the hydrodynamic characteristics and fluid structure interaction for a fixed OWC located in a numerical wave flume. A number of model tests are conducted for various regular incident wave conditions by modifying the wave amplitudes and wavelengths. The measured free surface elevation at the chamber center and the oscillatory air pressure generated by the fluctuating free surface within the chamber are recorded. The hydrodynamic efficiency of the OWC is determined using these parameters. The simulation results are validated by comparing against previously published experimental and numerical data. Good agreement is observed in both cases. The geometric dimensions of the step are modified by altering the step height and step length. Furthermore, by altering the step length, the location of the front face of the step relative to the front wall of the OWC is adjusted. Therefore, the positional significance of the step can also be analyzed in terms of its relative location to the OWC chamber and to the flow field development. It is shown that the geometry of the step and the position of the vertical face of the step relative to the OWC influences the hydrodynamic efficiency. The research demonstrates that by optimizing the step geometry and position for a given wave condition a higher operational efficiency can be achieved.

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