| 后向台阶超声速流动的动力混合RANS／LES模拟 |
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| 引用本文： | 黄冉,孙明波,刘卫东.后向台阶超声速流动的动力混合RANS／LES模拟[J].航空发动机,2007,33(2):49-52,34. |
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| 作者姓名： | 黄冉 孙明波 刘卫东 |
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| 作者单位： | 国防科学技术大学,湖南长沙,410073 |
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| 摘 要： | 针对可压缩湍流流动,构建了1种动力混合RANS/LES模式。运用该模式模拟了超声速后向台阶流动,结果再现了二维后向台阶剪切层的拟序结构,计算得到了统计平均的压力分布,回流区长度与实验结果符合较好。与定系数的一般混合RNAS/LES模拟结果的对比表明,动力混合RANS/LES模式在对流场拟序结构的捕捉、流动时均压力分布方面表现较优。
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| 关 键 词： | 混合RANS/LES 后向台阶 超声速流动 |
| 修稿时间： | 2006年5月16日 |
Dynamic Hybrid RANS/LES simulation of supersonic flow over back-facing step |
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| Authors: | Huang Ran Sun Mingbo Liu Weidong |
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| Abstract: | Dynamic hybrid RANS(Reynolds-Averaged Navier-Stokes)/LES(Large Eddy Simulation) model is set up for compressible turbulent flow.Supersonic flow over back-facing step is simulated by above model,and the simulations reproduce the coherent structure for two-dimension back-facing step in shear layer regions.Statistical average of pressure distribution is calculated,and the simulations agree well with experimental results for the length of circumfluence.Comparing to general hybrid RNAS/LES model of determined coefficient,the model has the adventages in capturing coherent structure of flowfiled and time averaged pressure distribution. |
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| Keywords: | hybrid RANS/LES back-facing step supersonic flow |
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