The question of which turbulence model is better for a given class of applications is always confusing for the CFD researchers and users. Comparative assessments of scale-adaptive simulation (SAS), improved delay detached-eddy simulation (IDDES) and other hybrid RANS/LES models based on eddy-viscosity models (EVMs) are thoroughly investigated. But how well they perform based on a second-moment closure needs to be answered. In this paper, a widely acclaimed Reynolds-stress model (RSM) in aeronautical engineering, SSG/LRR-$\omega$ model, is carried out. The relevant test cases include the NACA0012 airfoil stalled flows and turret separated flow. In order to make a more reasonable comparison, a seventh-order scheme WCNS-E8T7 is adopted to reduce the influence of the numerical dissipation and a symmetrical conservative metric method is used to ensure the robustness. By comparing with the relevant experimental data and the solutions by original SSG/LRR-$\omega$ model (etc. URANS), it shows that all of the three hybrid methods (SAS, IDDES and hybrid filtering methods) based on the SSG/LRR-$\omega$ model have a good ability to simulate unsteady turbulence. Among them, the IDDES correction has the most potential.

对于给定的应用类别，哪种湍流模型更好的问题总是让 CFD 研究人员和用户感到困惑。对尺度自适应模拟 (SAS)、改进的延迟分离涡模拟 (IDDES) 和其他基于涡粘度模型 (EVM) 的混合 RANS/LES 模型的比较评估进行了彻底研究。但是需要回答基于第二时刻关闭它们的表现如何。在本文中，航空工程中广受赞誉的雷诺应力模型 (RSM) SSG/LRR-$\omega$模型，进行。相关测试案例包括 NACA0012 翼型失速流和转塔分离流。为了进行更合理的比较，采用七阶方案WCNS-E8T7来减小数值耗散的影响，并采用对称保守度量方法来保证鲁棒性。通过与相关实验数据和原始SSG/LRR的解决方案进行比较——$\omega$ 模型（等 URANS），它表明所有基于 SSG/LRR 的三种混合方法（SAS、IDDES 和混合过滤方法）-$\omega$模型具有很好的模拟非定常湍流的能力。其中，IDDES 校正的潜力最大。