Abstract This discussion is based on the paper by Cui et al. (2019) (hereafter identified as “the original authors” or “the original paper”). The original authors present a review on the application of CFD in the analysis of self-rectifying turbines for OWC wave energy conversion devices. We feel that this review is incomplete, as it overlooks a number of papers published in recent years that gave a new explanation for a phenomenon largely studied in the last two decades and discussed in the original paper: the hysteresis in Wells turbine performance. In addition, the original authors, in their conclusions, envisage a larger use of CFD in the coming years, especially for the unsteady analysis of the chamber-turbine interaction, probably ignoring that several CFD studies focusing on this aspect have already been published. In fact, it is through three-dimensional time-dependent CFD studies of the unsteady interaction between chamber and turbine that the explanation of the cause of the hysteresis was found. The objective of this discussion is to clarify two important aspects: the chamber-turbine interaction and the turbine hysteresis, that in our opinion were not correctly analyzed in the original review paper by Cui et al.

中文翻译：

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Cui, Y., Liu, Z., Zhang, X. 和 Xu, C. 讨论了“用于 OWC 波浪能转换的轴流式自整流涡轮机的 CFD 研究综述”。

摘要 本讨论基于 Cui 等人的论文。（2019）（以下称为“原作者”或“原论文”）。原作者综述了 CFD 在 OWC 波能转换装置自整流涡轮机分析中的应用。我们认为这篇评论是不完整的，因为它忽略了近年来发表的许多论文，这些论文对过去二十年中大量研究并在原始论文中讨论的现象提供了新的解释：威尔斯涡轮机性能的滞后。此外，原作者在他们的结论中设想在未来几年更多地使用 CFD，特别是对于腔室-涡轮相互作用的非稳态分析，可能忽略了一些关注这方面的 CFD 研究已经发表。实际上，正是通过对腔室和涡轮机之间非定常相互作用的三维时间相关 CFD 研究，找到了滞后原因的解释。本次讨论的目的是澄清两个重要方面：室-涡轮相互作用和涡轮滞后，我们认为在崔等人的原始评论论文中没有正确分析。