2-EQUATION EDDY-VISCOSITY TURBULENCE MODELS FOR ENGINEERING APPLICATIONS
2-EQUATION EDDY-VISCOSITY TURBULENCE MODELS FOR ENGINEERING APPLICATIONS
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DOI：
10.2514/3.12149
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发表时间：
1994-08-01
期刊：
影响因子：
2.5
通讯作者：
MENTER, FR
中科院分区：
文献类型：
--
作者：
MENTER, FR
提出了两种新的两方程涡粘性湍流模型。它们结合了现有模型的不同元素，这些元素被认为优于它们的替代品。第一种模式称为基线(BSL)模式，在边界层内区使用原始的Wilcox k-omega模式，在外部区域和自由切变流动中切换到标准k-epsilon模式。它的性能与Wilcox模型相似，但避免了该模型对自由流的强烈敏感性。第二个模型是对BSL模型中涡粘性定义的修正，它考虑了主切变应力的输运效应。新的模型被称为剪应力输运模型，它在逆压梯度流动的预测方面有了重大改进。
Two new two-equation eddy-viscosity turbulence models will be presented. They combine different elements of existing models that are considered superior to their alternatives. The first model, referred to as the baseline (BSL) model, utilizes the original k-omega model of Wilcox in the inner region of the boundary layer and switches to the standard k-epsilon model in the outer region and in free shear flows. It has a performance similar to the Wilcox model, but avoids that model's strong freestream sensitivity. The second model results from a modification to the definition of the eddy-viscosity in the BSL model, which accounts for the effect of the transport of the principal turbulent shear stress. The new model is called the shear-stress transport-model and leads to major improvements in the prediction of adverse pressure gradient flows.