| 自然状态及声激励状态下轴对称尾流的流动显示结果(英文) |
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| 引用本文： | 董宇飞,魏中磊,徐诚.自然状态及声激励状态下轴对称尾流的流动显示结果(英文)[J].实验流体力学,1997(2). |
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| 作者姓名： | 董宇飞 魏中磊 徐诚 |
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| 作者单位： | 中科院力学研究所!北京，100080，北京大学力学与工程科学系!北京，100871，南京理工大学机械学院!南京，210094 |
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| 摘 要： | 流动显示演示了轴对称钝体前缘分离剪切层中Kelvin－Helmholtz不稳定波的演化发展情况。声激励状态下的流场结构与自然状态相比发生了很大的变化，分离剪切层与外加声激励的相互作用蕴含着魔鬼台阶现象，该现象经常在两个根子相互耦合的动力系统中产生。
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| 关 键 词： | K-H不稳定波 分离剪切层 声激励 湍流控制 非线性动力系统 |
VISUALIZATION RESULTS OF AXISYMMETRICAL WAKE FLOW WITH/WITHOUT ACOUSTIC EXCITATION |
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| Dong Yufei, Wei Zhonglei, Wei Zhongoei.VISUALIZATION RESULTS OF AXISYMMETRICAL WAKE FLOW WITH/WITHOUT ACOUSTIC EXCITATION[J].Experiments and Measur in Fluid Mechanics,1997(2). |
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| Authors: | Dong Yufei Wei Zhonglei Wei Zhongoei |
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| Abstract: | Visualization results demonstrate the evolution of Kelvin-Helmholtz unstable waves into vortex pairing in a separated shear layer of a blunf circular. The results with acoustic excitation are quite different from that without acoustic excitation, and the phenomenon with excitation in a separated shear layer follows the rule of Devil's staircase, which always occurs in a non-linear dynamical system of two coupling vibrators. |
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| Keywords: | K-H unstable wave separated shear layer acoustic excitation turbulent control non-linear dgnamical system |
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