Page 136 - 《水资源与水工程学报》2022年第3期
P. 136

!33 " ! 3 #                       & ' ( ) & * + , -                               Vol.33No.3
               2022 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2022

            DOI:10.11705/j.issn.1672-643X.2022.03.17

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              Numericalsimulationofwatersupplyandenergydissipationinfishwayinlet

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                         HEXinjuan ,BAIBing,SUNWanguang ,SUWenliang ,LIGuangyi
                (1.ChinaWaterNortheasternInvestigation,Design&ResearchCompany,Changchun130021,China;2.ResearchCentreon
                          ColdRegionEngineeringTechnology ,MinistryofWaterResources,Changchun130061,China)
              Abstract:Inthedesignoffishway,watersupplyandenergydissipationpoolisusuallysetupattheinletsec
              tiontoincreasetheflowvelocityoffishwayandstrengthenitsabilityofattracting,collectingandaccommodat
              ingfish.Themixingofthewaterfromwatersupplyandthatfromtheenergydissipationpoolcausesobvious
              disturbancetothewaterinthefishway ,whichleadstotheflowdisorderinthefishway(thepartattheenergy
              dissipationpool ).Inordertocompletelycapturethesmallscaleyetcomplexturbulentflowfieldstructureand
              obtainthedistributionofturbulentkineticenergysuitableforfishmigration,athreedimensionalnumerical
              modelwasusedtosimulatethecomplexthreedimensionalflowfieldofwatersupplyandenergydissipationat
              thefishwayinletofapowerstation ,soastosolvetheturbulentkineticenergyparameterandoptimizethewa
              tersupplyandenergydissipationschemeofthecoverplates.Theresultsshowthatwhenthecoverplatesare
              setuponthetopoftheenergydissipationpool ,thewatersupplyflowentersthefishwaythroughthegapbe
              tweenthecoverplates,forcingthelargescaleturbulentvorticestobreakdowntosmallscalevortices.When
              thesizeofthevortexbecomessmaller ,theviscousshearstressiseasytotransformtheturbulentkineticenergy
              intointernalenergyanddissipateit ,sothattheturbulentkineticenergyinthefishwaydecreases.Inaddition,
              byadjustingthewidthoftheseamsbetweenthecoverplates,theoutflowofwatersupplybecomerelativelyu
              niform ,andtheturbulentkineticenergycanalsobereduced.Whentheseamtypeissetasnarrowatboth
              endsbutwideatthemiddle ,theverticalvelocityofflowineachseamisuniform,whichisconducivetofish
              migration.Thiscalculationresultscanprovidetheoreticalbasisfortheinletdesignofsimilarfishwayfacilities
              toobtainastableanduniformwatersupplyflowandimprovethefishwayefficiency.
              Keywords:fishwayinlet;watersupplyandenergydissipation;coverplate;turbulentkineticenergy;flow
              filed;fishwayefficiency


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