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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8IBJK:TV135;S956.3 LMNOP:A LQRK:1672643X(2022)03013211
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,athreedimensionalnumerical
modelwasusedtosimulatethecomplexthreedimensionalflowfieldofwatersupplyandenergydissipationat
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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