Abstract The rapid development of the oscillating water column (OWC) wave energy converter proposes a demand to predict its overall performance accurately. Traditional experimental and numerical studies only employed the orifice or porous media as the power take-off substitutes, causing an inaccurate evaluation of the OWC performance. In this study, an impulse turbine model was used directly in a generic OWC model for the secondary-stage energy conversion. The wave-flume tests were conducted under irregular wave conditions and the rotation speeds of the turbine were fixed. Typical time histories of some performance parameters were presented. The primary-stage and secondary-stage efficiencies were analyzed under various test conditions. It was found that the distribution characteristics of the overall efficiency of the chamber-turbine system is significantly determined by the secondary-stage efficiency. The different distribution characteristics of the efficiencies for the regular and irregular wave conditions indicated that the irregular wave tests are preferred for the shape parameter and operating mode design of the OWC plant.

中文翻译：

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不规则波浪条件下模型比例的 OWC 室涡轮系统的波槽测试

摘要 振荡水柱（OWC）波浪能转换器的快速发展提出了对其整体性能进行准确预测的需求。传统的实验和数值研究仅采用孔板或多孔介质作为取力器的替代品，导致对 OWC 性能的评估不准确。在这项研究中，脉冲涡轮模型直接用于二级能量转换的通用 OWC 模型。波浪水槽试验是在不规则波浪条件下进行的，涡轮机的转速是固定的。介绍了一些性能参数的典型时间历程。在各种测试条件下分析了初级和次级效率。结果表明，腔室-涡轮系统整体效率的分布特征显着取决于二级效率。规则波和不规则波工况下效率的不同分布特征表明，不规则波试验是 OWC 装置的形状参数和运行模式设计的首选。