Turbulence Model Study for the Flow Around the NASA Common Research Model
Turbulence Model Study for the Flow Around the NASA Common Research Model
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NASA 通用研究模型周围流动的湍流模型研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
O. Brodersen
中科院分区：
文献类型：
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作者：
V. Togiti;B. Eisfeld;O. Brodersen
对第五阻力预测研讨会委员会提供的通用混合网格和内部生成的混合网格上的 NASA 通用研究模型的机翼-机身配置进行了湍流模型研究。在这里，应用了具有和不具有二次构成关系扩展的涡粘模型，该模型解释了法向湍流应力的各向异性，以及微分雷诺应力模型。本文首先讨论了湍流模型对机翼-机身区域侧体分离预测以及整体气动力和力矩系数的影响，随后提出了网格细化对预测的影响。最后，通过将数值预测与 NASA 国家跨音速设施的实验数据进行比较，论证了二次构成关系扩展对涡粘模型预测的影响，并讨论了不同湍流模型的性能。
A turbulence model study was performed for the wing–body configuration of NASA’s common research model on common hybrid grids provided by the Fifth Drag Prediction Workshop Committee and on an in-house-generated hybrid grid. Here, eddy-viscosity models with and without quadratic constitution relation extension, which accounts for the anisotropy of normal turbulent stresses, and a differential Reynolds stress model were applied. In this paper, first, the influence of turbulence models on the prediction of side-of-body separation in the wing–body region and on the overall aerodynamic force and moment coefficients is discussed, and later, the influence of grid refinement on the predictions is presented. Finally, the effect of the quadratic constitution relation extension on the predictions of eddy-viscosity models is demonstrated and performance of different turbulence models is discussed by comparing numerical predictions with the experimental data from NASA’s National Transonic Facility.