壅水条件下弯道流速分布规律研究  

Research on the Velocity Distribution in Curved River of Backwater Conditions

作　　者：王路[1] 马旭东[1] 周其航 聂锐华[1] WANG Lu;MA Xu-dong;ZHOU Qi-hang;NIE Rui-hua(State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,成都610065

出　　处：《中国农村水利水电》2020年第7期85-90,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金重点项目(51539007)。

摘　　要：为研究壅水条件下弯道流速分布规律,对90°弯曲河道开展了不同壅水程度的概化水槽试验。通过ADV对弯道试验段的三维流速进行精细测量并分析后发现:不同壅水程度试验组次的水流动力轴线在弯顶断面以前基本一致,过了弯顶断面,随着壅水程度增大,水流动力轴线向凹岸偏移的位置越靠近下游;对于同一断面,随着壅水程度增大,水深逐渐增大,时均流速逐渐减小,纵向流速和横向流速分布也越来越均匀。In order to study the velocity distribution in curved river of backwater conditions,flume experiments with different backwater degrees are carried out in 90°curved rivers.After a detailed measurement and analysis of the three-dimensional flow velocity in the bend by ADVP,it is found that the hydrodynamic axes of different backwater degrees are basically the same before the bend top section,the position of the hydrodynamic axes shifting to the concave bank is closer to the downstream with the increase in backwater after the top section.As for the same section,with the increase in backwater,the water depth and the average velocity decreases gradually,the distribution of longitudinal velocity and transverse velocity becomes more uniform.

关 键 词：壅水 弯道水流 水动力轴线 纵向流速 横向流速 

分 类 号：TV131.21[水利工程—水力学及河流动力学]