| 二维超音速边界层中三波共振和二次失稳机制的数值模拟研究 |
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| 引用本文： | 董亚妮,周恒.二维超音速边界层中三波共振和二次失稳机制的数值模拟研究[J].应用数学和力学,2006,27(2):127-133. |
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| 作者姓名： | 董亚妮 周恒 |
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| 作者单位： | 天津大学 力学系,天津 300072;2.南开大学 天津大学 刘徽应用数学研究中心,天津 300072 |
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| 基金项目： | 中国科学院资助项目;南开大学校科研和教改项目 |
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| 摘 要： | 通过直接数值模拟的方法，探讨在超音速边界层的转捩问题中，是否存在和不可压缩流情况相似的产生亚谐波的机制．结果表明，三波共振和二次失稳这两种机制都存在．讨论了这两种机制在层流至湍流的转捩中的重要性是否的确很大的问题．
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| 关 键 词： | 三波共振 二次失稳 超音速边界层 T-S波 |
| 文章编号： | 1000-0887（2006）02-0127-07 |
| 收稿时间： | 2005-04-13 |
| 修稿时间： | 2005-10-20 |
Numerical Study for the Resonant Triad Interaction and Secondary Instability in a Two-Dimensional Supersonic Boundary Layer |
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| DONG Ya-ni,ZHOU Heng.Numerical Study for the Resonant Triad Interaction and Secondary Instability in a Two-Dimensional Supersonic Boundary Layer[J].Applied Mathematics and Mechanics,2006,27(2):127-133. |
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| Authors: | DONG Ya-ni ZHOU Heng |
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| Institution: | Department of Mechanics, Tianjin University, Tianjin 300072, P. R. China; |
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| Abstract: | Direct numerical simulation was done for a supersonic boundary layer, to see if the mechanism for the generation of sub-harmonic waves, similar to those for the incompressible flows, existed in the process of laminar-turboulent transition. The results show that mechanisms of both resonant triad and secondary instability do exist. Discussions were made on whether these two mechanisms are really important in laminar-turbulent transition. |
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| Keywords: | resonant triad secondary instability supersonic boundary layer T-S wave |
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