河床高差对Y型汇流口螺旋流结构的影响

王晓刚; 严忠民; 张幸农

河床高差对Y型汇流口螺旋流结构的影响

1.
河海大学水利水电工程学院, 江苏, 南京, 210098;
2.
南京水利科学研究院, 江苏, 南京, 210029

基金项目: 国家自然科学基金资助项目(30490235)

详细信息

作者简介:
王晓刚(1980- ),男,江苏常熟人,博士,主要从事工程水力学、生态水力学研究.E-mail:wxg40007@126.com

中图分类号: TV133.2
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- 文章访问数: 241
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出版历程
- 收稿日期: 2007-11-01
- 刊出日期: 2008-11-24

Effect of bed discordance on helix flow at Y shaped junction

1.
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;
2.
Nanjing Hydraulic Research Institute, Nanjing 210029, China

Funds: The study is financially supported by the National Natural Science Foundation of China (No.30490235)

摘要

摘要: 通过三维数值模拟分析了河床高差(定义为干支流河床高程差与尾水位之比)对Y型汇流口螺旋流结构的影响。通常情况下,Y型汇流口水流为表面汇聚的双螺旋流。河床高差的存在将减小干流侧水流的螺旋流强度,增强支流侧水流螺旋度,而当支流侧螺旋流很强烈时,干流侧螺旋流将受到破坏。
- 河床高差 /
- 螺旋流 /
- Y型汇流口
Abstract: The structure of flow is very complex at Y shaped junction where there are multiform helix flows.This paper analyzes the effect of bed discordance (the ratio of bed discordant height between mainstream and tributary channel to the tailwater depth) on helix flow at Y shaped junction through the three-dimensional numerical simulation.The flow is dominated by two helical cells, usually back-to-back at Y shaped junction The bed discordance will decrease the intensity of helix flow at the side of mainstream channel and increase it at the side of tributary.When the intensity of helix flow is very strong at the side of tributary, the helix flow will be destroyed at the side of mainstream channel.
- bed discordance /
- helix flow /
- Y shaped juntion

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参考文献(12)

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文章访问数: 241
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河床高差对Y型汇流口螺旋流结构的影响

作者简介: 王晓刚(1980- ),男,江苏常熟人,博士,主要从事工程水力学、生态水力学研究.E-mail:wxg40007@126.com

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Effect of bed discordance on helix flow at Y shaped junction

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出版历程

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作者简介:
王晓刚(1980- ),男,江苏常熟人,博士,主要从事工程水力学、生态水力学研究.E-mail:wxg40007@126.com