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引入压力梯度的针对角区分离流动的Spalart-Allmaras模型的改进

马力 孙槿静 陆利蓬

马力, 孙槿静, 陆利蓬. 引入压力梯度的针对角区分离流动的Spalart-Allmaras模型的改进[J]. 航空动力学报, 2016, 31(10): 2405-2414. doi: 10.13224/j.cnki.jasp.2016.10.013
引用本文: 马力, 孙槿静, 陆利蓬. 引入压力梯度的针对角区分离流动的Spalart-Allmaras模型的改进[J]. 航空动力学报, 2016, 31(10): 2405-2414. doi: 10.13224/j.cnki.jasp.2016.10.013
MA Li, SUN Jin-jing, LU Li-peng. Modification of Spalart-Allmaras model with pressure gradientaiming for corner separation flow[J]. Journal of Aerospace Power, 2016, 31(10): 2405-2414. doi: 10.13224/j.cnki.jasp.2016.10.013
Citation: MA Li, SUN Jin-jing, LU Li-peng. Modification of Spalart-Allmaras model with pressure gradientaiming for corner separation flow[J]. Journal of Aerospace Power, 2016, 31(10): 2405-2414. doi: 10.13224/j.cnki.jasp.2016.10.013

引入压力梯度的针对角区分离流动的Spalart-Allmaras模型的改进

doi: 10.13224/j.cnki.jasp.2016.10.013
基金项目: 

国家自然科学基金(51420105008,11302012,51376001,51136003);国家重点基础研究发展计划(2012CB720205);中国航天技术创新基金

详细信息
    作者简介:

    马力(1988-),男,河北沧州人,博士生,主要从事湍流模型在分离流动中的改进研究.

    通讯作者:

    孙槿静(1989-),女,湖南岳阳人,博士生,主要从事叶轮机流动控制方面的研究.E-mail:sunjinjing0916@163.com

  • 中图分类号: V231.3

Modification of Spalart-Allmaras model with pressure gradientaiming for corner separation flow

  • 摘要: 针对Spalart-Allmaras(S-A)模型在角区分离计算中的问题,将无量纲的压力梯度引入其涡黏性输运方程的生成项,得到了改进的S-A模型.通过对两套含角区分离的低速压气机叶栅进行验证计算发现:与实验结果相比,原始S-A模型所得的分离区偏大,分离区内壁面压力偏低;而改进模型得到了与实验一致的分离区尺寸以及吸力面、压力面压力系数分布等结果.针对S-A模型涡黏性生成项和耗散项的分析表明:引入的无量纲压力梯度有效的识别了角区分离,在分离区内改变了涡黏性的生成、耗散关系,增大了涡黏性,从而缩小了计算所得分离区,同时在主流区保留了原始S-A模型的计算结果,进而带来了良好的改进效果.

     

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出版历程
  • 收稿日期:  2016-02-23
  • 刊出日期:  2016-10-28

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