Experimental study of resonant interactions of modulated waves in a non self-similar boundary layer

Experimental study of resonant interactions of modulated waves in a non self-similar boundary layer
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非自相似边界层中调制波共振相互作用的实验研究

DOI:
10.1007/978-90-481-3723-7_97
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Y.S. Kachanov
Y.S. Kachanov
中科院分区:
--
文献类型:
--
作者:
I.B. de Paula;W. Würz;E. Krämer;V.I. Borodulin;Y.S. Kachanov

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目前的工作是致力于研究在不可压缩的二维翼型边界层中托尔曼-施里希廷波的弱非线性相互作用。选定的谐振区进行了研究,重点是一个以上的基本T-S波在流动中存在的区。结果表明,有效次谐波模式的放大率不受基波时间调制的影响。二维基波的调制倾向于在调制频率处产生附加模式。此外,这些模式可以作为失谐的次谐波与基本模式共振。在“自然”跃迁的情况下,这种机制似乎是造成亚谐波初始种子的原因。
The current work is devoted to the study of weakly non-linear interactions of Tollmien-Schlichting waves in an incompressible, 2D airfoil boundary layer. Selected resonant regimes are investigated with emphasis to the regimes where more than one fundamental T-S wave are present in the flow. The results show that amplification rates of the effective sub-harmonic modes are not affected by modulations in time of the fundamental wave. It is also shown that modulations of the 2D fundamental waves tend to generate additional modes at modulation frequency. Furthermore, these modes can resonate with the fundamental ones as detuned subharmonics. This mechanism seems to be responsible for the initial seeds of subharmonics in cases of ‘natural’ transition.
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
J. Healey
通讯作者: J. Healey
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
J. Crouch
通讯作者: J. Crouch