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首页> 外文期刊>Journal of Aircraft >Extension of a Reynolds-Stress-Based Transition Transport Model for Crossflow Transition
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Extension of a Reynolds-Stress-Based Transition Transport Model for Crossflow Transition

机译：基于雷诺应力的过渡流运输模型的扩展

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摘要

Two crossflow transition prediction approaches, the local C1-based approach and the local helicity-based approach, have been implemented into a Reynolds-stress-based transition transport model of the ��-Re��t modeling framework. The differential Reynolds stress model is the SSG/LRR-�� model that has been coupled with the ��-Re��t model. The whole framework of the coupled model, including the crossflow extensions, is presented in detail. A grid sensitivity study for crossflow transition prediction was conducted. In addition, the influence of the numerical scheme on the computational results is discussed. The new Reynolds-stress-based transition model is compared with the ��-Re��t model coupled to the SST two-equation eddy-viscosity turbulence model including the two crossflow extensions for the NLF (2)-0415 infinite swept wing, the DLR 6:1 prolate spheroid and the DLR-F4 wing-body geometry. The comparisons show that the ��-Re��t-CF Reynolds-stress-based transition model can yield very accurate results, which, in terms of the predicted transition onset, are sometimes better than those of the ��-Re��t-CF in conjunction with the eddy-viscosity model.
机译：两种交叉流过渡预测方法，即基于局部C1的方法和基于局部螺旋度的方法，已被实施到��-Re��t建模框架的基于雷诺应力的过渡运输模型中。雷诺应力微分模型是SSG /LRR-��模型，已与��-Re��t模型耦合。详细介绍了耦合模型的整个框架，包括错流扩展。进行了网格敏感性研究，以预测横流过渡。此外，还讨论了数值方案对计算结果的影响。将新的基于雷诺应力的过渡模型与��-Re��t模型与SST两方程涡流-粘性湍流模型耦合进行了比较，该模型包括NLF（2）-0415无限扫掠机翼的两个错流扩展， DLR 6：1扁长球体和DLR-F4机翼几何。比较结果表明，基于Re-old-CF雷诺应力的过渡模型可以产生非常准确的结果，就预测的过渡开始而言，有时效果优于��-Re�� t-CF结合涡流-粘度模型。

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