第30卷第3期 2018年6月
浙江水利水电学院学报
J. Zhejiang Univ of Wat. Res & Electric Pow.
D0I;10.3969/j.issn.2095-7092.2018.03.003
Val30No.3 Jun.2018
突扩式消力池T型水跃的流速分布与边界层发展
傅铭焕，侯毅'，陈炳斌”，潘龙泉'，张志昌”，陈昊（1.浙江省水利水电勘测设计院浙江杭州310002;2.浙江铭诚建设有限公司，
浙江绍兴312030;3.西安理工大学，陕西西安710048）
摘要：通过研究突扩式消力池T型水跃断面流速分布、最大流速沿程分布的变化规律、突扩式消力池T型水跃边界层的沿程变化规律，认为突扩式消力池T型水跃的断面流速分布具有相似性和分区性；边界层内断面流速即服从指数律分布也服从对数律分布；突扩式消力池T型水跃的最大流速沿程逐渐衰减；边界层厚度是水流运动粘滞系数、跃前断面水深、跃前断面平均流速和沿程距离的函数。提出了断面流速、沿程最大流速和边界层厚度的计算
公式并对所提出的公式与已有文献的试验成果进行了对比分析，验证了计算方法的正确性，关键词：突扩式消力池；T型水跃；断面流速；最大流速；边界层
中图分类号：TV135.2*1
文献标志码：A
文章编号：1008536X(2018)03-0017-05
FlowVeloityDistributionandBoundaryLayerDevelopment
ofT-shapedWaterJumpinExpandingStillingPool
FU Ming-han,HOU Yi',CHENBing-bin,PANLong-quan',ZHANG Zhi-chang,CHENHao(1. Zhejiang Design Institute of Water Conservancy and Hydro -electrie Power ,Hangzhou 310002 , China ; 2. Zhejiang Mingcheng Construction CO. , LTD. , Shaoxing 312020, China; 3. Xian University of Technology , Xi'an 710048, China)
Abstrac t : The sectionalvelocity distribution of T -shaped water jump in expanding stilling pool , the change rule of maximum flow velocity distribution and the distance evolution of boundary layer of T -shaped water jump in expanding stilling pool are all researched. The results indicate that sectionalvelocity distribution of T -shaped water jump in expanding stilling pool -shows its similarity as well as its distinguish , while the sectional velocity in boundary layer complies with hoth exponential law distribution and logarithmic law distribution . The maximum flow velocity of T-shaped water jump in expanding stilling pooldegrades gradually along the course . The thickness of the boundary layer is a function of the viscosity coefficient of wa -ter flow motion, the waterdepth before jumping , the average sectional velocity before jumping and the distance along the path. The ealeulationformula for sectional flow , maximum velocity and the thickness of boundary layer are proposed and the
test results are compared with existing literature analysis , the correctness of the caleulation method is verified . Key wrds ; expanding stilling pool ; T-shaped hydraulie jump ; maximum flow velocity ; boundary layer
突扩式水跃是指下泄急流突然扩散到下游较
宽渠道，在下游渠道中过渡为缓流的一种三元空间水跌.根据下游渠道尾水水深的不同，可将突扩式水跃分为R型水跃、S型水跃和T型水跃1.当下游渠道尾水水深较浅，水跃跃前断面位于扩散后的
收稿日期：2017-12-28
作者简介傅路综1989－），男，浙江杭州人，工程师，主要从事水工水力学力高郁数据
下游渠道中，此时水跃称为R型水跃.当下游水深较大，跃前断面位于上游较窄渠道而跌后断面位于下游较宽渠道，此时称为T型水跌.当跌前断面位于突然扩散断面附近，此时发生的水跃称为S型水跃
文献[1]通过模型试验，研究了S型淹没水跃水跃区沿程断面流速分布、水跃跃后水深、水跃长度及消能率的变化规律.文献[2]试验研究了突扩