LES and hybrid RANS/LES of swirling flows with compression by using differential subgrid stress models

建议的工作旨在发展由相应的输运方程所支配的次网格应力模型。我们将研究传统的LES以及一种新型的混合RANS/LES过程。在前一种情况下，将特别注意接口匹配。研究中的流动形态与燃烧室的几何形状有关，显示出壁面边界和自由分离区。此外，还将考虑由于移动的墙壁相互靠近而受到压缩的旋流。在这种情况下，将提供域名系统数据，以便校准混合LES/RANS次网格模型。

The proposed work aims at development of the subgrid stress model governed by the corresponding transport equation. Both the conventional LES as well as a novel hybrid RANS/LES procedure will be investigated. Particular attention will be devoted to the interface matching in the former case. The flow configurations under investigation are pertinent to combustor geometries, exhibiting wall-bounded and free separation regions. Furthermore, swirling flows subjected to compression caused by moving walls approaching each other will be considered. DNS data will be provided in this case, in order to calibrate the hybrid LES/RANS subgrid model.