| 绕丁坝流动结构实验研究 |
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| 引用本文： | 张柏山,吕志咏,祝立国. 绕丁坝流动结构实验研究[J]. 北京航空航天大学学报, 2002, 28(5): 585-588. DOI: 10.3969/j.issn.1001-5965.2002.05.023 |
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| 作者姓名： | 张柏山 吕志咏 祝立国 |
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| 作者单位： | 北京航空航天大学,飞行器设计与应用力学系 |
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| 摘 要： | 利用流动显示和片光源技术,对绕丁坝的流动进行了实验研究,以便了解丁坝参数对流态的影响.实验是在水槽中进行的.发现在丁坝的上游会形成马蹄涡,在丁坝的背风面会形成卡门涡.按雷诺Re数的大小可以把绕丁坝的流态分成4种类型:定常单个马蹄涡、非定常单个马蹄涡、非定常双马蹄涡Ⅰ及非定常双马蹄涡Ⅱ.实验表明丁坝的交角及丁坝的个数对丁坝的流态有重要影响.
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| 关 键 词： | 涡 流动显示 流动分离 流态 |
| 文章编号： | 1001-5965(2002)05-0585-04 |
| 收稿时间： | 2001-03-12 |
| 修稿时间： | 2001-03-12 |
Experimental Study on Flow Construction over Spur Dikes |
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| ZHANG Bai-shan,L,uuml,Zhi-yong,ZHU Li-guo. Experimental Study on Flow Construction over Spur Dikes[J]. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28(5): 585-588. DOI: 10.3969/j.issn.1001-5965.2002.05.023 |
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| Authors: | ZHANG Bai-shan Lü Zhi-yong ZHU Li-guo |
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| Affiliation: | Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics |
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| Abstract: | To understand effect of number and incidence of spur-dikes on flow pattern, flow construction over spur-dikes was studied by flow visualization and light sheet technique in a water channel. There are horse-shoe vortex around spur-dikes and Karman vortices behind spur-dikes. Depending on Reynolds number, flow patterns over spur-dikes can be divided into 4 types: steady single horse-shoe vortex; unsteady single horse-shoe vortex; unsteady double horse-shoe vortices Ⅰ and unsteady double horse-shoe vortices Ⅱ. If number and incidence of spur-dike decrease, intensity of horseshoe vortex and Karman vortices decrease. |
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| Keywords: | vortex flow visualization flow separation flow pattern |
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