| 弯段温差剪切分层流断面环流结构与掺混强度研究 |
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| 引用本文： | 华祖林,邢领航,褚克坚.弯段温差剪切分层流断面环流结构与掺混强度研究[J].水科学进展,2007,18(4):531-537. |
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| 作者姓名： | 华祖林 邢领航 褚克坚 |
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| 作者单位： | 河海大学, 水文水资源与水利工程科学国家重点实验室, 环境科学与工程学院浅水湖泊, 综合治理与资源开发教育部重点试验室, 江苏 南京 210098 |
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| 基金项目： | 国家重点实验室基金;国家自然科学基金;江苏省自然科学基金;江苏省社会发展基金 |
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| 摘 要： | 对弯段温差剪切分层流的断面环流微细结构与掺混强度特征进行了试验研究。选取45°、90°、1 80°三种不同弯曲度水槽,探求了密度分层流从明显分层到强混合状态下断面环流结构的演变过程,发现了明显分层与强混合两种不同状态下3个环流结构的区别,捕捉到了从分层态向混合态转捩过程中临界情况下四环流结构存在的现象,揭示了明显分层与强混合状态不同断面环流结构的根本机理;同时也对不同弯曲强度情况下掺混强度的沿程变化规律进行探讨与研究。
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| 关 键 词： | 温差剪切分层流 弯段 环流结构 掺混强度 |
| 文章编号： | 1001-6791（2007）04-0531-07 |
| 收稿时间： | 2006-04-28 |
| 修稿时间： | 2006-04-282006-09-17 |
Circulation structure and mixing intensity of stratified shear flows in bends of open channel |
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| HUA Zu-lin,XING Ling-hang,CHU Ke-jian.Circulation structure and mixing intensity of stratified shear flows in bends of open channel[J].Advances in Water Science,2007,18(4):531-537. |
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| Authors: | HUA Zu-lin XING Ling-hang CHU Ke-jian |
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| Institution: | State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering;Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environmental Science & Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The microstructure of circumfluence and the characteristic of the mixing intensity on the cross-section of thermally stratified shear flow in curved flumes are studied experimentally.By the experimental investigation of the curved flumes with three different sinuosities of 45°,90° and 180°,the transition of the circumfluent structure on the cross-section from the stable stratification to mixing is explored.The four-circulation patterns of the secondary flow are first detected at the critical condition of the conversion of the stable stratification to mixing Moreover,the differences of three-circulation patterns of the secondary flow between stable stratification and mixing are also first discovered,and the reasons of difference between two situations are investigated In addition,the change process of the mixing intensity along the curved flumes is obtained. |
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| Keywords: | thermally stratified shear flow bend circumfluent structure mixing intensity |
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