| 混合层中四涡合并过程的数值研究 |
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| 引用本文： | 邵雪明,林建忠,余钊圣. 混合层中四涡合并过程的数值研究[J]. 科技通报, 2000, 16(3): 169-174,180 |
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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,浙江,杭州,310027
2. 浙江大学力学系,流体传动及控制国家重点实验室,浙江,杭州,310027;杭州应用工程技术学院,浙江,杭州,310012 |
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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： | 用拟谱方法对混合层四涡合并的规律进行了数值研究。分析了其波和次谐波之间相位差对涡合并过程的影响，并引入旋转点和拉伸点的概念对种影响进行了解释。计算结果表明：四涡的合并存在６种形式，因此，可以通过施加多级次谐波并改变它们之间的相位差主动控制拟序涡的发展和演变。
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| 关 键 词： | 混合层 数值模拟 四涡合并 自由剪切层流场 |
Numerical Research on the Merging of Four Vortices in a Mixing Layers |
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| SHAO Xue-ming,LIN Jian-zhong,YU Zhao-sheng. Numerical Research on the Merging of Four Vortices in a Mixing Layers[J]. Bulletin of Science and Technology, 2000, 16(3): 169-174,180 |
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| Authors: | SHAO Xue-ming LIN Jian-zhong YU Zhao-sheng |
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| Abstract: | The merging of four vortices 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 six ways for amalgamation of four vortices. Therefore, the evolution of vortices can be controlled positively by superimposing multi harmonics and changing their phase differences. |
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| Keywords: | mixing layer merging of vortices numerical simulation |
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