| 自由剪切流的参数共振理论 |
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| 引用本文： | 赵耕夫.自由剪切流的参数共振理论[J].天津大学学报(自然科学与工程技术版),1997,30(6):679-685. |
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| 作者姓名： | 赵耕夫 |
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| 摘 要： | 提出了包含有平均修正的参数共振理论，并研究了自由剪切流的二次稳定性问题，数值结果证明，三维亚谐波的人振对横向波数有很强选择性，而基频共振模式在很大的波数范围内显示出不稳定性，平均流的修正对亚谐共振有显著影响，对后者则影响很小
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| 关 键 词： | 自由剪切流 参数共振 平均流修正 稳定性 剪切流 |
ON THE PARAMETRIC RESONANCE THEORY OF FREE SHEAR FLOW |
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| Zhao,Gengfu.ON THE PARAMETRIC RESONANCE THEORY OF FREE SHEAR FLOW[J].Journal of Tianjin University(Science and Technology),1997,30(6):679-685. |
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| Authors: | Zhao Gengfu |
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| Institution: | Dept. of Mechanics and Engineering Measurments |
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| Abstract: | In this paper a theory of parametric resonance in which the mean flow distortion is considered is proposed to study the secondary instability of the free shear flow. The numerical results indicate that the subharmonic resonance shows a strong selectivity of the spanwise wavenumber and the instability of the fundamental resonance mode occurs in a wide scope of the spanwise wavenumber. The mean flow distortion has evident influence on the growth of the subharmonic mode but has little influence on the fundametal mode. |
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| Keywords: | free shear layer parametric resonance mean flow distortion |
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