漫滩水流二次流项系数研究

杨中华; 高伟; 槐文信

doi:10.3879/j.issn.1000-0887.2010.06.005

漫滩水流二次流项系数研究

doi: 10.3879/j.issn.1000-0887.2010.06.005

武汉大学水资源与水电工程科学国家重点实验室,武汉 430072

基金项目: 国家自然科学基金资助项目(50749031);教育部博士点基金资助项目(20070486022)

详细信息

作者简介:
杨中华(1977- ),男,山东成武人,副教授,博士(联系人.E-mail:yzh@whu.edu.cn).

中图分类号: TV133.1
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- 被引次数: 0
出版历程
- 修回日期: 2010-03-25
- 刊出日期: 2010-06-15

Study on the Secondary Flow Coefficient of Overbank Flow

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, P. R. China

摘要

摘要: 基于SKM方法，引入二次流项系数，给出了漫滩水流水深平均流速沿横向分布的二维解析解．文中对SERC-FCF的系列试验进行了模拟，计算结果与实测资料吻合较好．在此基础上，进一步研究了复式河道断面形态对二次流项系数的影响，并分析了造成各种影响的原因．计算结果表明，二次流项系数的大小与断面形态有关，而其正负号与二次流的方向有关，这为二次流项系数的选取提供了参考依据．
- 复式河道 /
- 漫滩水流 /
- 流速分布 /
- 二次流
Abstract: The 2-D analytical solution for tran sverse velocity distribution in compound open channels was presented based on the Shiono and Knight method, in which the secondary flow coefficient was introduced to take account in to the effect of the secondary flow. The modeling results agree well with the expermiental results from science and engineering research council-flood channel facility (SERC-FCF), based on which the effect of geography on the secondary flow coefficient is analyzed, as well as the essential reason for such effects. The modeling results show that the in tensity of the secondary flow is related with the geometry of the compound channel section, and the sign of Kvalue is related with the rotating direction of the secondary flow cell, which proposes scien tific reference for the selecting of Kvalue.
- compound channels /
- overbank flows /
- velocity distribution /
- secondary flow

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参考文献(25)

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