| 分层流体中移动动量源生成准二维偶极子涡街特性实验 |
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| 引用本文： | 陈科,尤云祥,胡天群,朱敏慧,王小青. 分层流体中移动动量源生成准二维偶极子涡街特性实验[J]. 物理学报, 2011, 60(2): 24702-024702 |
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| 作者姓名： | 陈科 尤云祥 胡天群 朱敏慧 王小青 |
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| 作者单位： | (1)上海交通大学海洋工程国家重点实验室,上海 200240; (2)中国科学院电子学研究所微波成像技术国家重点实验室,北京 100080 |
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| 基金项目： | 微波成像技术国家重点实验室基金和海洋工程国家重点实验室基金资助的课题. |
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| 摘 要： | 采用水平移动射流方法模拟移动动量源,实验研究了该移动动量源在密度分层流体中生成准二维偶极子涡街的机理,分析了偶极子涡街的演化特性. 在系列实验基础上,获得了移动动量源在密度分层流体中能够演化为偶极子涡街的(Re,Fr)组合条件. 对不同的Re取值,获得了偶极子涡街无因次形成时间及其无因次涡街平均波长倒数与Fr之间的相关关系,表明它们不依赖于Re数,而与Fr近似为幂指数关系. 关键词：分层流体移动动量源偶极子涡街涡街形成时间
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| 关 键 词： | 分层流体 移动动量源 偶极子涡街 涡街形成时间 |
| 收稿时间： | 2010-01-07 |
Experiments on quasi-two-dimensional dipolar vortex streets generated by a moving momentum source in a stratified fluid |
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| Chen Ke,You Yun-Xiang,Hu Tian-Qun,Zhu Min-Hui,Wang Xiao-Qing. Experiments on quasi-two-dimensional dipolar vortex streets generated by a moving momentum source in a stratified fluid[J]. Acta Physica Sinica, 2011, 60(2): 24702-024702 |
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| Authors: | Chen Ke You Yun-Xiang Hu Tian-Qun Zhu Min-Hui Wang Xiao-Qing |
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| Affiliation: | State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;State Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;State Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Experiments were carried out in a stratified fluid with a momentum source modeled by a horizontally moving jet. The generation mechanism was investigated and the evolution characteristics were analyzed for the quasi-two-dimensional dipolar vortex streets generated by such a moving momentum source in the stratified fluid. The conditions of different Reynold and Froude number (Re, Fr) combinations under which the dipolar vortex street can be generated by moving momentum source were determined by use of data based on the present series of experiments. Moreover, the dependence of the dimensionless formation time and inverse dimensionless average wavelength of the dipolar vortex street on Fr for different values of Re was obtained. The results show that these parameters are independent of Re and approximately follow some exponential laws of Fr. |
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| Keywords: | stratified fluid moving momentum source dipolar vortex street vortex street formation time |
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