【英文标准名称】:Measurementofliquidflowinopenchannels-Computingstreamflowusinganunsteadyflowmodel
【原文标准名称】:明渠水流测量用不稳定流量模型计算水流流量
【标准号】:ISO/TR11627-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-05
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC113
【标准类型】:()
【标准水平】:()
【中文主题词】:速度测量;明渠流动;液体流动;流量测量;流量测量;斜槽
【英文主题词】:flowmeasurement;channelflow;flumes;velocitymeasurement;flowmeasurements;liquidflow
【摘要】:ThisTechnicalReportdescribesamethodforcomputingcontinuousrecordsofstreamflowinanopenchannelthroughthenumericalsolutionoftheone-dimensionalunsteadyflowequations.Suchanapproachistypicallyidentifiedasanunsteadyflowmodelandgenerallyinvolvestheuseofcomputersforsolutionoftheflowequations.Unsteadyflowmodelsareappropriateforcomputingstreamflowrecordsatlocationswhere(1)asingle-valuedstage-dischargerelationdoesnotexist,(2)backwateraffectsthedischargeunderselectedorallconditions,(3)flowsareaffectedbytides,or(4)itisnotpossibletogagetheflowusingvelocity-areamethods.Unsteadyflowmodelsalsoareappropriateforevaluatingtheeffectsofchangesinamanagedflowregimeondownstreamconditionspriortotheimplementationofanychanges.ThisTechnicalReportisapplicabletosteadyandunsteadyflows,tonomineeflows,andtotidalflowsinwhichtherearenosignificantlongitudinalandverticaldensitygradients.Themethodisconsideredequivalentto,orbetterthan,thecommonlyusedstage-fall-dischargetechnique(ISO1100-1:1996,7.2andAnnexC)becausethemethodusesinformationonthephysicalcharacteristicsofthechannel,includingthecross-sectionalgeometry,channelrugosityandchannelslope,andthemethodisbasedonamathematicaldescriptionofthephysicsoffluidflow.ThisTechnicalReportdescribesthetheoreticalbasisandfundamentalassumptionsofthetechnique,andprovidesasummaryofselectednumericalmethodsusedtosolvetheunsteadyflowequations.Alsoprovidedaredetailsontheapplicationofanunsteadyflowmodel,includingdatarequirements,proceduresformodelcalibration,testing,andapplications,andidentificationofuncertaintiesassociatedwiththemethod.ThisTechnicalReportdoesnotprovidesufficientinformationforthedevelopmentofacomputerprogramforsolvingtheunsteadyflowequations,butratherisbasedontheassumptionthatanadequatelydocumentedcomputerprogramisavailable
【中国标准分类号】:A53;P12
【国际标准分类号】:17_120_20
【页数】:23P;A4
【正文语种】:英语