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Comparison of numerical and experimental analyses for optimizing the geometry of OWC systems

机译：用于优化OWC系统几何形状的数值分析和实验分析的比较

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摘要

There is a considerable amount of wave energy that can be extracted from the oceans. This energy is largely untapped. Oscillating Water Column (OWC) is a mechanical system that utilizes fluctuating water level from sea waves to drive an air turbine which, in turn, provides electricity when transmitted to a generator. In this study, two sets of modeling, each involving a numerical modeling and a physical experimental modeling, were conducted in a wave flume to optimize OWC systems. By varying the length, width and angle of the air chamber, an OWC structure can be designed to obtain the maximum system power. The data used for designing the optimal geometry of the chamber that may yield the maximum conversion of wave energy to useful energy were provided from the interpretation of the measurements of these parameters. In this study, results of the numerical models were compared with the measured experimental values based on the Nash-Sutcliffe coefficient of efficiency (NSE) as performance evaluation criterion. The NSE values of both the classical and the modified OWC structures were obtained to be 0.97. It is observed that the results of the numerical models tend to follow much closer the results of the experimental model.
机译：可以从海洋中提取大量的波能。这种能量在很大程度上尚未开发。振荡水柱（OWC）是一种机械系统，利用海浪中波动的水位来驱动空气涡轮，该涡轮随后在传输至发电机时提供电力。在这项研究中，在波浪槽中进行了两组建模，每组都包含数值建模和物理实验建模，以优化OWC系统。通过改变气室的长度，宽度和角度，可以设计OWC结构以获得最大的系统功率。通过对这些参数的测量结果的解释，提供了用于设计腔室的最佳几何形状的数据，该最佳几何形状可以将波能转换为有用能量。在这项研究中，将数值模型的结果与基于Nash-Sutcliffe效率系数（NSE）作为性能评估标准的实验值进行比较。经典和修改的OWC结构的NSE值均为0.97。可以看出，数值模型的结果趋向于更接近实验模型的结果。

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