波状床面消力池水跃特性试验分析  

Test analysis of characteristics of hydraulic jump on corrugated beds of stilling basin

作　　者：傅铭焕[1,2] 张志昌[2] 梁锋 郭曙啸 余建平 

机构地区：[1]浙江省水利水电勘测设计院,浙江杭州310002 [2]西安理工大学,陕西西安710048

出　　处：《水利水运工程学报》2016年第1期100-106,共7页Hydro-Science and Engineering

摘　　要：研究波状床面水跃共轭水深和水跃长度对于波状床面消力池的设计极为重要。根据已有文献关于波状床面消力池水跃特性的试验资料,分析波状床面消力池共轭水深、水跃旋滚长度、水跃长度和水跃区消能率随跃前断面弗劳德数、壁面粗糙高度、跃前断面和跃后断面水深的变化规律。给出了波状床面水跃跃后水深的半理论公式和水跃旋滚长度、水跃长度的拟合公式,并对其进行验证,水跃共轭水深的平均误差分别为4.5%和3.3%,水跃旋滚长度和水跃长度的平均误差分别为7.4%和5.9%。研究表明,水跃跃后水深和水跃长度不仅是跃前断面弗劳德数的函数,还是壁面粗糙高度的函数;波状床面消力池水跃区消能率远大于一般混凝土壁面消能率,在相同弗劳德数情况下水跃区消能率随着壁面粗糙高度的增加而增加。It is very important to carry out studies of conjugate water depth and length of hydraulic jump for design of the corrugated beds of the stilling basin. According to the test data about characteristics of the hydraulic jump in the existing literatures, the change laws of the conjugate water depth, length of roller, length of the hydraulic jump and energy dissipation ratio with upstream Froude number, roughness height, initial depth of free hydraulic jump, sequent depth of the hydraulic jump are studied. The semi-theoretical formula of the conjugate water depth, and the fitting formulas of the length of roller, length of the hydraulic jump are put forward and verified using the test results. The mean errors of the conjugate water depth are respectively 4. 5% and 3.3%, and the length of roller and the length of the hydraulic jump are respectively 7.4% and 5.9%. The analysis results show that the sequent depth and the length of hydraulic jump are not only related to the upstream Froude number, and also to the roughness height of the wall surface. The energy dissipation ratio of the corrugated beds is much more than that on the smooth bed, that increases with the increase of the roughness height of the wall surface under the same upstream Froude number.

关 键 词：波状床面消力池 共轭水深 水跃旋滚长度 水跃长度 粗糙高度 

分 类 号：TV135.21[水利工程—水力学及河流动力学]