Abstract

A description of two methods for simulation of the flow around complex test configurations is considered. One method implements a well-known approach to solving the Reynolds-averaged Navier-Stokes equations with a closing differential turbulence model. Another method is based on scale-resolving wall-modelled LES approach (WMLES). The classical problem of the flow around the inclined backward-facing step with the generation of expansion waves, intensive shock waves and separated flow zones is considered. A comparison of computational and experimental data is done. The physics of the flow is described. The accuracy of the both approaches is evaluated.

中文翻译：

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基于RANS和LES方法的倾斜后向台阶超音速分离流的数值模拟。

摘要

考虑了两种用于模拟围绕复杂测试配置的流程的方法的描述。一种方法实现了一种众所周知的方法，即采用闭合微分湍流模型来求解雷诺平均Navier-Stokes方程。另一种方法是基于比例解析墙建模的LES方法（WMLES）。考虑到在倾斜的朝后台阶周围流动的经典问题，即产生膨胀波，强烈的冲击波和分离的流动区域。比较了计算数据和实验数据。描述了流的物理过程。评估两种方法的准确性。