长江科学院院报 ›› 2010, Vol. 27 ›› Issue (8): 6-11.

• 江湖泥沙与治理 • 上一篇    下一篇

干支流直角交汇区水流泥沙运动特性初步研究

詹 磊1,2, 董耀华2, 刘同宦2   

  1. 1. 长江航道测量中心,武汉 430010 ; 2. 长江科学院,武汉 430010
  • 出版日期:2010-08-01 发布日期:2012-08-22

Preliminary Study on Natures of Flow Structure and Sediment Transport in Right-angled Conjunction of Main and Branch Channels

ZHAN Lei 1,2, DONG Yao-hua 2, LIU Tong-huan 2   

  1. 1 . Changjiang Waterway Survey Center , Wuhan 430010, China ; 2.Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Online:2010-08-01 Published:2012-08-22

摘要: 通过总结前人有关干支流直角交汇区水流泥沙运动研究成果,归纳了干支流直角交汇区的分区水流泥沙运动特性,初步探讨了交汇区局部水头损失计算方法,提出了新的包含水深比及回流长度的局部水头损失系数计算公式,采用长江科学院水槽试验成果对计算公式进行了验证。验证结果表明:在汇流比较小时,计算与试验成果吻合较好。

关键词: 干支流直角交汇区 , 水流泥沙运动特性 , 局部水头损失 , 水槽试验

Abstract:  The motion laws of flow structure and sediment transport in right-angled conjunction area of main and branch channels are complicated which makes the corresponding further researches into predicaments. Through summarizing and analyzing those previous corresponding results on the natures of flow structure and sediment transport in the conjunctions, the division characteristics of flow structure and sediment transport had been generalized. Meanwhile the calculation method of local head loss had been preliminary studied. A new equation for calculating the local head loss coefficient associated with the depth ratio and the length of backwater had been presented. The equation was verified by the experimental flume data of Changjiang River Scientific Research Institute. The verified results indicate that the calculated values agree well with the experiment values where the conjunction ratio is small.

Key words: Right-angled Conjunction of main and branch channels  ,  nature of flow structure and sediment transport  ,   local head loss  ,   flume experiment

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