复式河槽正常水深计算方法比较

杨克君; 曹叔尤; 刘兴年

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复式河槽正常水深计算方法比较

杨克君, 曹叔尤, 刘兴年

文章导航 > 水科学进展 > 2005 > 16(2): 189-195

杨克君, 曹叔尤, 刘兴年. 复式河槽正常水深计算方法比较[J]. 水科学进展, 2005, 16(2): 189-195.

引用本文:

杨克君, 曹叔尤, 刘兴年. 复式河槽正常水深计算方法比较[J]. 水科学进展, 2005, 16(2): 189-195.

YANG Ke-jun, CAO Shu-you, LIU Xing-nian. Comparison of methods predicting normal depth in compound channels[J]. Advances in Water Science, 2005, 16(2): 189-195.

Citation:

YANG Ke-jun, CAO Shu-you, LIU Xing-nian. Comparison of methods predicting normal depth in compound channels[J]. Advances in Water Science, 2005, 16(2): 189-195.

复式河槽正常水深计算方法比较

四川大学高速水力学国家重点实验室, 四川, 成都, 610065

基金项目: 国家自然科学基金资助项目(50279024);高等学校博士学科点专项科研基金资助项目(20030610039)

详细信息

作者简介:
杨克君(1973- ),男,四川仁寿人,四川大学博士研究生,主要从事复式河槽水沙复杂行为研究.E-mail:yangkejun@163.com

通讯作者:
刘兴年,E-mail:liuxingnian@126.com

中图分类号: TV133.1

Comparison of methods predicting normal depth in compound channels

State Key Hydraulics Laboratory of High Speed Flows, Sichuan University, Chengdu 610065, China

Funds: The study is financially supported by the National Natural Science Foundation of China (No 50279024) and Specialzed Research Fund for Doctoral Program of Higher Education (No.20030610039).

摘要: 明渠恒定均匀流正常水深在水力计算中十分重要。而对于复式河槽,当洪水漫滩后,直接运用曼宁方程推求正常水深,将带来很大误差。系统地总结了计算正常水深的各种方法,用二分法求解,并运用英国科学工程研究协会洪水水槽设施(SERC-FCF)的大量系列水槽实验成果加以比较。比较发现,精度由高到低依次为COHM方法、刘沛清法、断面倾斜分割法、动量传递法、谢汉祥法、断面叠加法。通过对各种方法详细分析,建议在计算天然复式河槽正常水深时,COHM方法是值得推广的一种好方法。
- 正常水深 /
- 计算方法 /
- 比较 /
- 二分法 /
- 复式河槽
Abstract: The normal depth plays an important role in hydraulic calculation.To a compound channel,when water in a main channel flows in an out of bank condition and onto the adjoining flood plain,it results in great error if the normal depthiscal culated by the Manning equation.All kinds of methods predicting the normal depth in compound channels are systemically summarized in this paper.In all the methods,the normal depth is solved by the dichotomy method and compared with different series of experimental data from Engineering Research Council Flood Channel Facility.By comparison,it is found that the calculation precision is high with the methods considering momentum exchange between the main channel and the floodplain.According to the order from high precision to low,they are,in turn,the channel coherence method,the Liu Peiqing‘s method,the cross sectional inclined division method,the momentum transfer method,the Xie Han-xiang's method,and the superposing cross section method.By analyzing the advanteges and disadvantages of the methods mentioned above,it is pointed out that the channel coherence method is a good method in calculating the normal depth in natural rivers with compound cross section.
- normal depth /
- computational method /
- comparison /
- dichotomy /
- compound channels

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复式河槽正常水深计算方法比较

四川大学高速水力学国家重点实验室, 四川, 成都, 610065

基金项目: 国家自然科学基金资助项目(50279024);高等学校博士学科点专项科研基金资助项目(20030610039)

作者简介:
杨克君(1973- ),男,四川仁寿人,四川大学博士研究生,主要从事复式河槽水沙复杂行为研究.E-mail:yangkejun@163.com

通讯作者: 刘兴年,E-mail:liuxingnian@126.com

收稿日期: 2003-11-21
修回日期: 2004-03-30
刊出日期: 2005-03-25

中图分类号: TV133.1

关键词:

正常水深 /

计算方法 /

比较 /

二分法 /

复式河槽

摘要: 明渠恒定均匀流正常水深在水力计算中十分重要。而对于复式河槽,当洪水漫滩后,直接运用曼宁方程推求正常水深,将带来很大误差。系统地总结了计算正常水深的各种方法,用二分法求解,并运用英国科学工程研究协会洪水水槽设施(SERC-FCF)的大量系列水槽实验成果加以比较。比较发现,精度由高到低依次为COHM方法、刘沛清法、断面倾斜分割法、动量传递法、谢汉祥法、断面叠加法。通过对各种方法详细分析,建议在计算天然复式河槽正常水深时,COHM方法是值得推广的一种好方法。

English Abstract

Comparison of methods predicting normal depth in compound channels

State Key Hydraulics Laboratory of High Speed Flows, Sichuan University, Chengdu 610065, China

Funds: The study is financially supported by the National Natural Science Foundation of China (No 50279024) and Specialzed Research Fund for Doctoral Program of Higher Education (No.20030610039).

Received Date: 2003-11-21
Rev Recd Date: 2004-03-30
Publish Date: 2005-03-25

Keywords:

Abstract: The normal depth plays an important role in hydraulic calculation.To a compound channel,when water in a main channel flows in an out of bank condition and onto the adjoining flood plain,it results in great error if the normal depthiscal culated by the Manning equation.All kinds of methods predicting the normal depth in compound channels are systemically summarized in this paper.In all the methods,the normal depth is solved by the dichotomy method and compared with different series of experimental data from Engineering Research Council Flood Channel Facility.By comparison,it is found that the calculation precision is high with the methods considering momentum exchange between the main channel and the floodplain.According to the order from high precision to low,they are,in turn,the channel coherence method,the Liu Peiqing‘s method,the cross sectional inclined division method,the momentum transfer method,the Xie Han-xiang's method,and the superposing cross section method.By analyzing the advanteges and disadvantages of the methods mentioned above,it is pointed out that the channel coherence method is a good method in calculating the normal depth in natural rivers with compound cross section.

杨克君, 曹叔尤, 刘兴年. 复式河槽正常水深计算方法比较[J]. 水科学进展, 2005, 16(2): 189-195.

引用本文:

杨克君, 曹叔尤, 刘兴年. 复式河槽正常水深计算方法比较[J]. 水科学进展, 2005, 16(2): 189-195.

YANG Ke-jun, CAO Shu-you, LIU Xing-nian. Comparison of methods predicting normal depth in compound channels[J]. Advances in Water Science, 2005, 16(2): 189-195.

Citation:

YANG Ke-jun, CAO Shu-you, LIU Xing-nian. Comparison of methods predicting normal depth in compound channels[J]. Advances in Water Science, 2005, 16(2): 189-195.