Abstract The hybridization of Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES) methods is seen to be the most promising way to efficiently deal with separated turbulent flow simulations relevant to aerospace and wind energy applications. Characteristic conceptual features of popular hybrid RANS-LES and their applications to hill-type and airfoil flow including flow separation are described. Conceptual questions on existing hybrid RANS-LES are pointed out and ways to overcome these problems are presented. Further analyses show that corresponding novel hybrid RANS-LES methods generalize and improve existing methods. The discussions reveal, in particular, the great value of physical and mathematical realizability constraints for the substantial improvement of simulation methods.

中文翻译：

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湍流混合 RANS-LES 方法综述：概念和应用

摘要 雷诺平均纳维-斯托克斯 (RANS) 和大涡模拟 (LES) 方法的混合被认为是有效处理与航空航天和风能应用相关的分离湍流模拟的最有前途的方法。描述了流行的混合 RANS-LES 的特征概念特征及其在山型和翼型流中的应用，包括流分离。指出了现有混合 RANS-LES 的概念问题，并提出了克服这些问题的方法。进一步的分析表明，相应的新型混合 RANS-LES 方法对现有方法进行了推广和改进。讨论特别揭示了物理和数学可实现性约束对于仿真方法的实质性改进的巨大价值。