Numerical study on aerodynamic and hydrodynamic load characteristics of a floating pneumatic wave energy converter under real sea conditions

IF 9.4 1区工程技术 Q1 ENERGY & FUELS Energy Pub Date : 2025-01-01 Epub Date: 2024-12-09 DOI:10.1016/j.energy.2024.134153

Haochun Xu , Yongliang Zhang , Chen Wang , Huanbin Yang

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Abstract

The aerodynamic and hydrodynamic load characteristics of a floating pneumatic wave energy converter with a backward flow duct were numerically investigated under different sea conditions by using the Reynolds-Averaged Navier Stokes (RANS) equations and Volume of Fluid (VOF) method. The marine hydrological data used in this study was measured from a certain sea area in China, and the actual waves were regarded as a combination of a series of regular waves. The focus is on analyzing the influence of wave parameters on the capture width ratio and chamber pressure in the range of slight to very high sea conditions, as well as the distribution of pressure differences acting on the thin-walled structure of the converter to identify the weak parts of the converter structure. The results reveal that the air chamber pressure reaches its maximum value in a certain rough sea condition. The maximum pressure difference occurs on the top panel of the flow duct, with a maximum value of 36.5 kPa. These results provide valuable insights into the hydrodynamic behavior and performance characteristics of pneumatic wave energy converters, revealing their advantages in low loads acted on the device panels and specific areas for improving converter reliability.

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浮式气动波能转换器在实际海况下气动和水动力载荷特性的数值研究

采用reynolds - average Navier - Stokes （RANS）方程和流体体积（VOF）方法，对不同海况下带倒转风道的浮式气动波能转换器的气动和水动力载荷特性进行了数值研究。本研究中使用的海洋水文数据是在中国某一海域测量的，实际波浪被认为是一系列规则波浪的组合。重点分析波浪参数在小海况到极高海况范围内对捕集宽度比和室压的影响，以及作用在转炉薄壁结构上的压差分布，找出转炉结构的薄弱环节。结果表明，在一定的风浪条件下，气室压力达到最大值。最大压差出现在导流管顶板，最大压差为36.5 kPa。这些结果为气动波能转换器的流体动力学行为和性能特性提供了有价值的见解，揭示了它们在设备面板上的低负载和提高转换器可靠性的特定区域的优势。

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来源期刊

Energy 工程技术-能源与燃料

CiteScore

15.30

自引率

14.40%

发文量

审稿时长

14.2 weeks

期刊介绍： Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.