明渠水流交汇区流动特征试验研究

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/236656459ExperimentalstudyonflowbehavioratopenchannelconfluencesArticleinFrontiersofArchitectureandCivilEngineeringinChina·May2007DOI:10.1007/s11709-007-

2、0025-zCITATIONSREADS171614authors,including:XiaoYeWangL.Wei-ZhenCityUniversityofHongKong167PUBLICATIONS3,420CITATIONS145PUBLICATIONS2,883CITATIONSSEEPROFILESEEPROFILEAllcontentfollowingthispagewasuploadedbyL.Wei-Zhenon11June2015.Theuserhasrequestedenh

3、ancementofthedownloadedfile.第38卷第2期四川大学学报(工程科学版)Vol.38No.22006年3月JOURNALOFSICHUANUNIVERSITY(ENGINEERINGSCIENCEEDITION)Mar.2006　　文章编号:100923087(2006)0220001205明渠水流交汇区流动特征试验研究1123王协康,王宪业,卢伟真,刘同宦(1.四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065;2.香港城市大学建筑系,中国香港;3.长江

4、科学院河流研究所,湖北武汉430010)摘　要:天然河流中存在着大量的主支交汇河流,在干支流交汇处,水流结构变得十分复杂。通过水槽试验,应用声速多普勒测速仪(ADV),观测了入汇角为30°时,支流斜接主流入汇型河道的三维水流结构。试验表明:入汇上游受支流顶托影响,产生一定的壅水,出现低速区,而对侧由于束水作用产生高速区。在入汇一侧下游较短的距离,产生回流现象,并形成分离区,而在下游一定范围内,靠支流入汇侧出现水流高速区,并形成二次流结构。交汇区水流流动主要有水流分离区、高流速带、低流速带及剪切面等

5、。关键词:交汇水流;水流结构;声速多普勒测速仪中图分类号:TV133文献标识码:AExperimentalStudyonFlowStructureatOpenChannelConfluences1123WANGXie2kang,WANGXian2ye,LUWei2zhen,LIUTong2huan(1.StateKeyLab.ofHydraulicsandMountainRiverEng.,SichuanUniv.,Chengdu610065,China;2.Dept.ofBuildingandC

6、onstruction,CityUniv.ofHongKong,HongKong,China;3.YangtzeRiverScientificResearchInst.,Wuhan430010,China)Abstract:Channelconfluencesarecommoninnaturalriversandmanyhydraulicengineeringprojects.Theflowstructureatconfluencesbecomeverycomplexbecauseoftheint

7、eractionbetweentributaryandMainRiver.Theexperimentswereperformedinacombinedflumewith30°anglebetweenmainandtributaryflumelocatedatSichuanUniversity.Theveloc2itywasmeasuredusingathree2componentAcousticDopplerVelocimeter(ADV)overagriddefinedthroughoutthe

8、junc2tionregion.Basedontheanalysisofthevelocityatconfluence,thedistinctivecharacteristicsofachannelconfluenceflowmaybedividedintoseveralzonesincludingazoneofseparationimmediatelydownstreamofthejunctionbranchchannel,amaximumandminimumvelocityre