| 扰动波相位差对剪切层中相干结构的影响 |
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| 引用本文： | 张洪泉,舒玮.扰动波相位差对剪切层中相干结构的影响[J].空气动力学学报,1990,8(1):18-24. |
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| 作者姓名： | 张洪泉 舒玮 |
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| 作者单位： | 天津大学
(张洪泉)，天津大学(舒玮) |
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| 摘 要： | 当自由剪切层中存在多个扰动时,扰动波的相位差对大尺度相干结构的发展具有一定的作用。本文用数值模拟的方法对此进行了探讨,发现相位差的变化可使大尺度相干结构的演化表现为旋涡的合并或撕裂,并在一定程度上影响剪切层动量厚度的发展。
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| 关 键 词： | 湍流 扰动波 剪切层 相干结构 |
EFFECTS OF PERTURBATION PHASE DIFFERENCES ON THE LARGE SCALE COHERENT STRUCTURES IN FREE SHEAR LAYER |
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| Zhang Hongquan Shu Wei.EFFECTS OF PERTURBATION PHASE DIFFERENCES ON THE LARGE SCALE COHERENT STRUCTURES IN FREE SHEAR LAYER[J].Acta Aerodynamica Sinica,1990,8(1):18-24. |
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| Authors: | Zhang Hongquan Shu Wei |
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| Institution: | Tianjin University |
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| Abstract: | The phase differences between perturbation waves of different frequencies can affect the development of the large scale coherent structures in free shear layer. Numerical solutions are presented for various phase differences between a fundamental wave and its first subharmonic. It is found that the large scale structures develop in the manner of vortex merging or vortex splitting and that the spreading rate of the momentum thickness of the layer will be changed at different phase differences. |
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| Keywords: | large scale coherent structure vortex merging vortex splitting |
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