Page 153 - 《水资源与水工程学报》2022年第4期
P. 153
!33 " ! 4 # & ' ( ) & * + , - Vol.33No.4
2022 $ 8 % JournalofWaterResources&WaterEngineering Aug.,2022
DOI:10.11705/j.issn.1672-643X.2022.04.20
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FGHIJ:TV653 .4 KLMNO:A KPQJ:1672643X(2022)04014907
Characteristicsoftheslottypeflipbucketattheexitofthespillway
2
1
3
1
MALin,XIAPengfei,HUJiang,HAOXiaoniao
(1.YanglingVocational&TechnicalCollege,Yangling712100,China;2.NanjingHydraulicResearchInstitute,Nanjing
210029,China;3.XinchangCountyWaterResourcesandHydropowerBureau,Shaoxing312500,China)
Abstract:Thechoiceofenergydissipatertypesiscrucialtothedesignofwaterconservancyprojects.
Here,thecharacteristicsandvariationpatternsofwaterflowintheslottypeflipbucketinthedischarge
processarestudiedusingRNGk- ε turbulencemodelandvolumeoffluid(VOF)methodforthesimula
tionofthethree-dimensionalwatergastwophaseflowinthespillwayandplungepool.Theresultsshow
thatthewaterdepth,flowpatternandflowangleofthenumericalsimulationresultsareingoodagreement
withthoseofthephysicalmodeltest ,whichverifiesthefeasibilityofthenumericalsimulation.Onthis
basis,theshapeandpositionofthewatertongueintheair,theflowvelocityinthecontractionsectionof
theslot ,thepressuredistributionlawandthecharacteristicsoftheoutgoingflowfieldareanalyzed,with
whichthepositionofthemaximumpressureattheslotandthevariationlawofthewatertonguevelocityin
theairaredetermined.Theresultsindicatethatthenarrowingeffectoftheslottypeflipbucketisobvi
ous,thepositionsofthemaximumwatertonguevelocityintheairarebasicallythesame,andthevelocity
differenceateachpointatthesameverticalpositiondecreasesalongtheway.Thevelocityatthebottom
plateoftheslotsectionofthespillwayshowsaparabolicdistributionlaw ,whereasthepressureshowsa
distributionlawofthreeintervalsandthreetrends.Theresearchresultscanprovideareferenceforthe
designofenergydissipatersofthesametypeinpracticalengineeringprojects.
Keywords:slottypeflipbucket;watertongue;spillway;numericalsimulation;watergastwophase
flow;volumeoffluid(VOF)method
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