| 次谐波对混合层中拟序涡合并过程影响的数值研究 |
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| 引用本文： | 邵雪明,林建忠,余钊圣.次谐波对混合层中拟序涡合并过程影响的数值研究[J].上海力学,2000,21(3):282-287. |
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| 作者姓名： | 邵雪明 林建忠 余钊圣 |
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| 作者单位： | [1]浙江大学力学系流体传动及控制国家重点实验室，杭州310027 [2]杭州应用工程技术学院，郑州310027 |
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| 基金项目： | 浙江省自然科学基金青年科技人才专项资金资助项目 |
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| 摘 要： | 本文用拟谱方法对混合层二涡、三涡的合并规律进行了数值研究，分析了基波和交谐波之间相位差对涡合并过程的影响，并对此进行了解释。计算结果表明：二涡合并有配地和撕裂两种形式，且涡的完全通过撕裂合并的现象仅在相位差为π/2时出现；三涡合并有三种形式。通过计算可见，通过施加多级次谐波并改变它们之间的相位差可以主动控制拟序涡的发展和演变。
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| 关 键 词： | 混合层 拟序涡 次谐波 剪切湍流 合并规律 数值模拟 |
| 修稿时间： | 1999年6月28日 |
Numerical Research for Effect of Subharmonics on Vortex Merging in Mixing Layers |
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| SHAO Xue-ming,LIN Jian-zhong,YU Zhao-sheng.Numerical Research for Effect of Subharmonics on Vortex Merging in Mixing Layers[J].Chinese Quarterly Mechanics,2000,21(3):282-287. |
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| Authors: | SHAO Xue-ming LIN Jian-zhong YU Zhao-sheng |
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| Abstract: | The processes of vortex merging in mixing layers are simulated numerically with the pseudo-spectral method. The effect of phase differences among disturbance waves is examined. The results show that the processes of vortex merging are strongly influenced by changing phase differences. It is observed that there are two and three forms for the amalgamation of two and three vortices respectively. Therefore, the evolution of vortices can be positive controlled by superimposing multi-harmonics and changing their phase differences. |
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| Keywords: | mixing layer coherent vortex subharmonics |
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