Jet in cross flow is an important issue in engineering practice, for example, it is used to improve turbine efficiency in film cooling. In this study, the large eddy simulation and the spectrum analysis are employed to analyze the vortices in a jet in cross flow. The results show that the Rortex method more accurately identifies the vortex structures than other methods. In the analysis of the evolution of the spatial vortex structures, it is affirmed that the spectrum analysis using the Rortex value can effectively identify the characteristic vortex structures in a jet in cross flow.

中文翻译：

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基于Rortex的错流射流涡流识别与演化

错流射流是工程实践中的重要问题，例如，它用于提高薄膜冷却中的涡轮效率。在这项研究中，大涡模拟和频谱分析被用来分析横流中射流的涡流。结果表明，Rortex方法比其他方法更准确地识别涡旋结构。在分析空间涡旋结构的演变过程中，可以肯定的是，使用Rortex值进行频谱分析可以有效地识别横流中射流的特征涡旋结构。