Performance of dual‐chamber oscillating water column device under irregular incident waves using Reynolds averaged Navier–Stokes model

S. Koley, Parothidil Anjusree Krishnan, Amya Ranjan Ray, Artem Krasovsky
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Abstract

The purpose of this study is to analyze the hydrodynamic performance and efficiency of a dual‐chamber oscillating water column (OWC) device. For the Joint North Sea Wave Project (JONSWAP) incident waves spectrum, a two dimensional numerical wave tank is employed with nonlinear Reynolds averaged Navier–Stokes equations model along with the standard turbulence model. The free surface elevation is measured using the volume of fluid method. The numerical simulation demonstrates the streamline and velocity vector profiles throughout an entire pressure fluctuation cycle inside the chambers of the given OWC device. Further, investigation is carried out to analyze the impact of pressure drop and air flow rate through the orifice of the dual‐chamber OWC device on the power generation. Moreover, the power spectral density analysis of the free surface elevation is provided to know the variation of the parameters in the frequency domain. These results demonstrate that the effectiveness of the dual‐chamber OWC device is more near the significant wave height  m.
使用雷诺平均纳维-斯托克斯模型分析双腔振荡水柱装置在不规则入射波下的性能
本研究旨在分析双腔振荡水柱(OWC)装置的水动力性能和效率。针对联合北海波浪项目(JONSWAP)的入射波谱,采用了一个二维数值波浪槽,其中包含非线性雷诺平均纳维-斯托克斯方程模型和标准湍流模型。采用流体体积法测量了自由表面高程。数值模拟展示了给定 OWC 设备腔室内整个压力波动周期的流线和速度矢量剖面。此外,研究还分析了通过双腔 OWC 设备孔口的压降和空气流速对发电量的影响。此外,还提供了自由表面升高的功率谱密度分析,以了解参数在频域中的变化。这些结果表明,在显著波高 m 附近,双腔 OWC 装置的效果更好。
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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