Interaction of discrete and continuous boundary layer modes to cause transition

Paul A. Durbin; Tamer A. Zaki; Yang Liu

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Interaction of discrete and continuous boundary layer modes to cause transition

机译：离散和连续边界层模式的相互作用导致过渡

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摘要

The interaction of discrete and continuous Orr-Sommerfeld modes in a boundary layer is studied by computer simulation. The discrete mode is an unstable Tollmien-Schlichting wave. The continuous modes generate jet-like disturbances inside the boundary layer. Either mode alone does not cause transition to turbulence; however, the interaction between them does. The continuous mode jets distort the discrete modes, producing A shaped vortices. Breakdown to turbulence is subsequent. The lateral spacing of the A's is sometimes the same as the wavelength of the continuous mode, sometimes it differs, depending on the ratio of wavelength to boundary layer thickness.

机译：通过计算机仿真研究了边界层中离散和连续的Orr-Sommerfeld模式的相互作用。离散模式是不稳定的Tollmien-Schlichting波。连续模式在边界层内部产生喷射状干扰。仅这两种模式都不会导致湍流过渡；但是，它们之间的相互作用确实存在。连续模式射流使离散模式变形，产生A形涡旋。随后发生湍流。 A的横向间距有时与连续模式的波长相同，有时会有所不同，具体取决于波长与边界层厚度的比率。

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来源
《International Journal of Heat and Fluid Flow》 |2009年第3期|403-410|共8页
作者
Paul A. Durbin; Tamer A. Zaki; Yang Liu;
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作者单位

Aerospace Engineering, Iowa State University, Howe Hall, Ames, IA 500! 1, United States;

Mechanical Engineering, Imperial College London, United Kingdom;

Knight Capital, United States;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
transition; boundary layer instability; computer simulation;

机译：过渡;边界层不稳定性;计算机模拟;

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2. Boundary-layer transition by interaction of discrete and continuous modes [J] . YANG LIU, TAMER A. ZAKI, PAUL A. DURBIN Journal of Fluid Mechanics . 2008,第Null期

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3. Continuous Mode Transition in High-speed Boundary-layers [J] . Jongwook Joo, Paul A. Durbin Flow, Turbulence and Combustion . 2012,第3期

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Interaction of discrete and continuous boundary layer modes to cause transition

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