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k-ω-γ模式对转捩影响因素的预测性能研究

郝子辉 阎超 周玲

郝子辉, 阎超, 周玲. k-ω-γ模式对转捩影响因素的预测性能研究[J]. 力学学报, 2015, 47(2): 215-222. doi: 10.6052/0459-1879-14-294
引用本文: 郝子辉, 阎超, 周玲. k-ω-γ模式对转捩影响因素的预测性能研究[J]. 力学学报, 2015, 47(2): 215-222. doi: 10.6052/0459-1879-14-294
Hao Zihui, Yan Chao, Zhou Ling. PARAMETRIC STUDY OF A k-ω-γ MODEL IN PREDICTING HYPERSONIC BOUNDARY-LAYER FLOW TRANSITION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 215-222. doi: 10.6052/0459-1879-14-294
Citation: Hao Zihui, Yan Chao, Zhou Ling. PARAMETRIC STUDY OF A k-ω-γ MODEL IN PREDICTING HYPERSONIC BOUNDARY-LAYER FLOW TRANSITION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 215-222. doi: 10.6052/0459-1879-14-294

k-ω-γ模式对转捩影响因素的预测性能研究

doi: 10.6052/0459-1879-14-294
基金项目: 国家973 计划资助项目(2009CB72414).
详细信息
    通讯作者:

    阎超,教授,主要研究方向:计算流体力学.E-mail:yanchao@buaa.edu.cn

  • 中图分类号: V211.3

PARAMETRIC STUDY OF A k-ω-γ MODEL IN PREDICTING HYPERSONIC BOUNDARY-LAYER FLOW TRANSITION

Funds: The project was supported by the National 973 project (2009CB72414).
  • 摘要: 高超声速边界层转捩的准确预测对飞行器的防热、减阻至关重要,而影响高超声速边界层转捩的因素众多.从模式角度出发研究边界层转捩的影响因素,采用k-ω-γ 转捩模式对5°圆锥的边界层转捩进行了数值分析,计算了不同头部钝度、来流雷诺数和湍流度情况下的边界层转捩,并与实验结果进行了对比. 研究结果表明:k-ω-γ 转捩模式基本能够反映头部钝度、来流雷诺数、来流湍流度对高超声速圆锥边界层转捩的影响规律,但对转捩后的热流峰值预测不准;从模式构造角度分析发现,雷诺数越高或头部钝度越小,层流区边界层越薄,k-ω-γ 转捩模式中第一、第二模态时间尺度增大,因此转捩起始位置提前;来流湍流度越大,等效脉动动能初值越大,导致层流区发展过程中等效脉动动能越大,因此转捩易于发生.

     

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出版历程
  • 收稿日期:  2014-09-24
  • 修回日期:  2014-12-11
  • 刊出日期:  2015-03-18

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