Adv Search
  • 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引（EI）收录期刊
Volume 17 Issue 5
. 
Turn off MathJax
Article Contents
Article Navigation >  Advances in Water Science  > 2006  >  17(5): 685-692

SUN Dong-po, YAN Jun, LUO Qiu-shi, DAI Xiao-lin. Analysis of momentum distribution and influence of shallow flow in the wide-steep channel[J]. Advances in Water Science, 2006, 17(5): 685-692.
Citation: SUN Dong-po, YAN Jun, LUO Qiu-shi, DAI Xiao-lin. Analysis of momentum distribution and influence of shallow flow in the wide-steep channel[J]. Advances in Water Science, 2006, 17(5): 685-692.
shu

Analysis of momentum distribution and influence of shallow flow in the wide-steep channel

  • 1.

    North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China;

  • 2.

    Wuhan University, Wuhan 430072, China;

  • 3.

    Water Resource Department of Jiangsu Province, Nanjing 210029, China

Funds:  The study is financially supported by the National Natural Science Foundation of China(E090401 and 50279009).
  • Received Date: 2005-05-09
  • Rev Recd Date: 2005-11-28
  • Publish Date: 2006-09-25
  • In this paper the flow properties and influence on the joint at downstream are studied.First,by analyzing on the development of boundary layer in the shallow supercritical flow and aeration properties,we find the character of energy dissipation that the resistance loss of shallow flow in the wide-steep channel is more than that of the flow in the general steep channel, and get its range value of the velocity coefficient. Then,according to the different flow and boundary condition,we analyze the flow momentum distribution in wide-steep channel,and find that when the ratio B/H<40 and the discharge is larger,the flow momentum lateral distribution in the end of steep channel shows a saddle profile which has stronger stability and anti disturbance;but when the ratio B/H >40 and the discharge is smaller,the momentum lateral distribution shows a elliptical profile which has bad stability and can't restrain the outside disturbance. Based on analyzing the we attains that the instability of shallow flow in the end of steep channel originates from lack of stronger both wings control in momentum lateral distribution, which brings about accumulation and increase progressively of minor disturbance and leads to instability of the end hydraulic jump and insufficiency of the energy dissipation. In order to improve stability of join flow at downstream,a measure adjusting of momentum lateral distribution is put forward in this paper.
  • [1] 陈椿庭.水工水力学及水文论文集[M].北京:水利电力出版社,1993.84-120.
    [2] 阎晋垣.掺气分流墩设施的研究[J].水利学报,1988(12):33-38.
    [3] 孙东坡,解伟,王二平,等.槐扒非常溢洪道水工模型试验研究报告[R].郑州:华北水利水电学院,2002.46-56.
    [4] 吴持恭.水力学[M].北京:高等教育出版社,2003.208-227.
    [5] 李建中,赵修荣.泄水建筑物紊流边界层探讨[J].水利学报,1985(8):12-16.
    [6] Sigurson.The structure and contro1 of turbulent reattaching flow.[J].J Fluid Mech,1995,198:139-l65.
    [7] 河南省水利科学研究所.白沙除险加固工程溢洪道模型试验[R].郑州:河南省水利科学研究所,2003.20-52.
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索
Get Citation
PDF
XML

Article Metrics

Article views(90) PDF downloads(563) Cited by()

Proportional views
Related

Analysis of momentum distribution and influence of shallow flow in the wide-steep channel

  • 1. North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China;
  • 2. Wuhan University, Wuhan 430072, China;
  • 3. Water Resource Department of Jiangsu Province, Nanjing 210029, China
Funds:  The study is financially supported by the National Natural Science Foundation of China(E090401 and 50279009).
  • Received Date: 2005-05-09
  • Rev Recd Date: 2005-11-28
  • Publish Date: 2006-09-25

Abstract: In this paper the flow properties and influence on the joint at downstream are studied.First,by analyzing on the development of boundary layer in the shallow supercritical flow and aeration properties,we find the character of energy dissipation that the resistance loss of shallow flow in the wide-steep channel is more than that of the flow in the general steep channel, and get its range value of the velocity coefficient. Then,according to the different flow and boundary condition,we analyze the flow momentum distribution in wide-steep channel,and find that when the ratio B/H<40 and the discharge is larger,the flow momentum lateral distribution in the end of steep channel shows a saddle profile which has stronger stability and anti disturbance;but when the ratio B/H >40 and the discharge is smaller,the momentum lateral distribution shows a elliptical profile which has bad stability and can't restrain the outside disturbance. Based on analyzing the we attains that the instability of shallow flow in the end of steep channel originates from lack of stronger both wings control in momentum lateral distribution, which brings about accumulation and increase progressively of minor disturbance and leads to instability of the end hydraulic jump and insufficiency of the energy dissipation. In order to improve stability of join flow at downstream,a measure adjusting of momentum lateral distribution is put forward in this paper.

SUN Dong-po, YAN Jun, LUO Qiu-shi, DAI Xiao-lin. Analysis of momentum distribution and influence of shallow flow in the wide-steep channel[J]. Advances in Water Science, 2006, 17(5): 685-692.
Citation: SUN Dong-po, YAN Jun, LUO Qiu-shi, DAI Xiao-lin. Analysis of momentum distribution and influence of shallow flow in the wide-steep channel[J]. Advances in Water Science, 2006, 17(5): 685-692.
shu

    HTML

Reference (7)

Catalog

    Copyright © 《水科学进展》杂志社

    Organizer: Nanjing Institute of water resources, China Water Conservancy Society Address: No.34, Hujuguan, NanjingChina Pos: 210024

    Tel: 025-85829770Email: skxjz@nhri.cn

    Supported by: Beijing Renhe Information Technology Co. Ltd    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return