Page 142 - 《水资源与水工程学报》2025年第1期
P. 142
!36 "!1 # & ' ( ) & * + , - Vol.36No.1
2025 $ 2 % JournalofWaterResources&WaterEngineering Feb.,2025
DOI:10.11705/j.issn.1672-643X.2025.01.15
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KLMNO:TV652 PQRST:A PUVO:1672643X(2025)01013808
Simulationoptimizationofweirsurfacecurveforthe
spillwaysurfaceopeninginhighgravitydams
GOUWenjuan,WANGTianyuan,LIUDongming,SONGJiajie
(StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin300072,China)
Abstract:Theweirsurfacecurveofthespillwaysurfaceopeninginhighgravitydamsisoneoftheimportant
factorsaffectingthehydrauliccharacteristicsofthedischargedwaterandthestabilityofthespillwaystructure.
Duetothesteepweirsurfacecurve ,localnegativepressureaccumulatesontheweirsurfaceduringtheproto
typeflooddischargeofthespillwaysurfaceopening.Toavoidcavitationanderosion ,athreedimensionalnu
mericalmodelofthespillwaysurfaceopeningofahighgravitydamwasestablishedfortheoptimizationofweir
surfacecurve.TheRNGk- ε modelwasusedtosimulateturbulence,andthevolumeoffluid(VOF)method
wasadoptedtotrackthefreesurface.Theflooddischargeofthespillwaysurfaceopeninginahighgravity
damwassimulatedandtheresultswerecomparedwiththatofthehydraulicmodeltest ,whichdemonstrated
theaccuracyofthesimulation.ThreeoptimizationschemesoftheWEScurveequationwerefurtherproposed
tostudytheinfluenceofdifferentschemesonthenegativepressureofthespillwaysurfaceopening.There
searchresultsshowthatthelengthandvalueofthenegativepressureontheweirsurfacebottomplatebothde
crease ,astheweirsurfacecurvebecomesgentler.Scheme1hasthesmallestnegativepressure,althoughthe
dischargecapacityslightlydecreases,itstillmeetsthedesignrequirements.Moreover,astheweirsurfacebe
comesgentler,theflowlinesinthecurvesectionbecomesmoother,theflowvelocityatthesamesectionde
creases,sodoesthebottomflowvelocitygradient.Atthesamewaterdepth,theentrainedairconcentration
increases.Therefore ,scheme1isselectedasthefinaloptimizedshape.
Keywords:highgravitydam;weircurve;hydrauliccharacteristics;shapeoptimization;numericalsimulation
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