考虑滩地植被的复式断面河道水流的二维解析解

槐文信; 高敏; 曾玉红; 李丹

doi:10.3879/j.issn.1000-0887.2009.09.006

考虑滩地植被的复式断面河道水流的二维解析解

doi: 10.3879/j.issn.1000-0887.2009.09.006

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(50679061;50709025;50749031)

详细信息

作者简介:
槐文信(1963- ),男,陕西乾县人,教授,博士生导师(联系人.E-mail:wxhuai@whu.edu.cn).

中图分类号: TV133.1
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出版历程
- 收稿日期: 2008-09-16
- 修回日期: 2009-07-02
- 刊出日期: 2009-09-15

Two-Dimensional Analytical Solution for Compound Channel Flows With Vegetated Floodplains

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

摘要

摘要: 针对滩地植被化的复式断面河道的水流特性, 从沿水深积分的紊流时均运动微分方程出发, 基于恒定均匀流的假设, 给出了植被作用下河道水流水深平均流速沿横向分布的二维解析解. 其中, 将植被对水流的影响归结为拖曳力项, 在模型中计及了二次流的影响, 并对二次流强度系数K的取值进行了初步探讨. 分别对顺直河道横断面和蜿蜒河道的顶点断面进行了计算, 计算结果与试验资料符合良好, 表明给出的二维解析解可用于植被作用下复式断面河道水流水深平均流速沿横向分布的数值预报.
- 复式河道 /
- 植被 /
- 拖曳力 /
- 二次流
Abstract: A 2-D analytical solution for compound channel flows with vegetated floodplains is presented.For steady uniform flow,the depth-integrated N-S equation was used for analysis.The effects of the vegetation were considered as the drag force item.The secondary currents were also taken into account in the governing equations and preliminary estimation of the secondary current intensity coef-ficient K was discussed.Predicted results for the straight channels and apex cross-section of meandering channels agree well with the experimental data,which shows that the analytical model presented here can be applied to predict the flow in compound channels with vegetated floodplains.
- compound channel /
- vegetation /
- drag force /
- secondary currents

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参考文献(11)

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