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Studyonoptimizationofthesideinlet?outletwiththecomplextunnel
layoutinapumpedstoragepowerstation
GAOXueping,LUOChang,ZHUHongtao,LIUYinzhu
(StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,Tianjin 300072,China)
Abstract:Sometimes,itischallengingtoavoidthesideinlet?outletofapumpedstoragepowerstationthatcon
nectsthetunnelwithacomplexlayout.Whenthedistancebetweenthetwoisclose ,thereisaseriousbiasflow
phenomenonoftheinlet?outletundertheoutflowcondition,whichleadstotheunevendistributionofthevelocityof
thetrashracksectionandtheunevendistributionoftheorificeflow.However,duetothelimitationoftopographic
andgeologicalconditionsinpracticalengineering,theadjustablerangeoftunnelswithcomplexlayoutislimited,
whichbringsgreatdifficultytotheoptimizationofhydraulicdesignofinlet?outlet.Inordertosolvethehydraulic
problemswhentheinlet?outletwiththecomplextunnellayout ,thispaperusesthenumericalsimulationmethodto
studythehydrauliccharacteristicsoftheinlet?outletwiththecomplextunnellayout ,andputsforwardthecorre
spondingoptimizationmethod.Theresultsshowthatwhentheinlet?outletwiththecomplextunnellayout ,theori
ficeflowratiooftheoutflowconditionexceedstherangeof0.9 - 1.1 ,andthenon - uniformitycoefficientoftheflow
velocityofthetrashracksectionisgreaterthan2.Undertheconditionofnotchangingthelayoutofthetunnel ,an
optimizationmethodisproposed ,thatis,orificeflowdistributionisimprovedbyreducingtheretreatdistanceof
themiddlepartitionwall ,andtheflowvelocitydistributionofthetrashracksectionisimprovedbyadjustingthe
bottomslopeoftheinlet?outlet.Theinfluencerangeofthecomplextunnellayoutisfurtheranalyzed ,anditisde
terminedthatwhenthedistancebetweenthecomplextunnellayoutandtheinlet?outletislessthan20D ,itsinflu
enceonthehydrauliccharacteristicsoftheinlet?outletshouldbeconsidered.Theresearchresultscanprovideguid
ancefortheshapedesignandoptimizationoftheinlet?outletofpumpedstoragepowerstation.
Keywords:pumpedstoragepowerstation;sideinlet?outlet;tunnelwithcomplexlayout;velocitydistributionof
trashracksection ;flowdistribution;numericalsimulation
(责任编辑:韩 昆)
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