Computational Study of a Supersonic Base Flow Using Hybrid Turbulence Methodology
Computational Study of a Supersonic Base Flow Using Hybrid Turbulence Methodology
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DOI：
10.2514/1.13690
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发表时间：
2005-06
期刊：
影响因子：
2.5
通讯作者：
S. Kawai;K. Fujii
中科院分区：
文献类型：
--
作者：
S. Kawai;K. Fujii
将大涡模拟/ reynolds -average Navier-Stokes （LES/RANS）混合方法应用于高雷诺数超音速轴对称基流。使用LES/RANS混合方法可以成功地准确预测基底流场和基底压力，其计算成本低于纯LES和单调综合大涡模拟（MILES）方法。通过与LES、MILES、RANS和实验结果的比较，验证了本文提出的LES/RANS混合方法预测大规模分离高雷诺数流的效率和可靠性。LES/RANS混合模拟精确地解析了剪切层卷起、下游区域大涡运动、再循环区域内小涡运动以及末端视图大蘑菇状图案的形成等非定常湍流运动的物理性质
Large-eddy simulation/Reynolds-averaged Navier-Stokes (LES/RANS) hybrid methodology is applied to a high-Reynolds-number supersonic axisymmetric base flow. Accurate predictions of the base flowfield and base pressure are successfully achieved by using the LES/RANS hybrid methodology with less computational cost than that of pure LES and monotone integrated large-eddy simulation (MILES) approaches. Both the efficiency and reliability of the present LES/RANS hybrid methodology for the prediction of massively separated high-Reynolds-number flows are identified by comparison with the results obtained by LES, MILES, RANS, and the experiments in detail. The LES/RANS hybrid simulation accurately resolves the physics of unsteady turbulent motions, such as shear-layer rollup, large-eddy motions in the downstream region, small-eddy motions inside the recirculating region, and formation of large mushroom-shaped patterns in the end view