| 混合层中由次谐波导致的失稳过程的数值研究 |
| |
| 引用本文： | 余钊圣,林建忠.混合层中由次谐波导致的失稳过程的数值研究[J].空气动力学学报,1998,16(4):439-446. |
| |
| 作者姓名： | 余钊圣 林建忠 |
| |
| 作者单位： | 浙江大学力学系 |
| |
| 摘 要： | 用拟谱方法对随时间发展的二维混合层流场进行了直接数值模拟，给出了高雷诺数下在Ｋｅｌｖｉｎ－Ｈｅｌｍｈｏｌｔｚ波卷起后存在的限振幅次振波地大尺度拟序结构进一步的失稳演变过程，包括大涡的配对，撕裂以及二次配对，同时探讨了初始的次谐波强度，雷诺数相位差等对大涡配对和合并过程的影响。
|
| 关 键 词： | 混合层 数值模拟 次谐波 失稳过程 流场 涡流 |
Numerical Research on Instability in Mixing Layers Caused by Subharmonic Modes |
| |
| Yu,Zhaosheng,Lin,Jianzhong.Numerical Research on Instability in Mixing Layers Caused by Subharmonic Modes[J].Acta Aerodynamica Sinica,1998,16(4):439-446. |
| |
| Authors: | Yu Zhaosheng Lin Jianzhong |
| |
| Abstract: | Numerical simulations have been performed in time developing plane mixing layers at high Reynolds number with pseudo spectral method.The further evolution of the coherent structures originating from Kelvin Helmholtz rollup,such as pairing,shredding and second pairing in existence of subharmonic modes with finite amplitudes,were presented in this paper.The effects of initial amplitudes of pairing modes.Reynolds number and phase shift on pairing and merging of large eddies were investigated. |
| |
| Keywords: | mixing layer numerical simulation psueudo spectral method coherent structure pairing instability |
| 本文献已被 CNKI 维普 等数据库收录！ |
