Page 213 - 《水资源与水工程学报》2022年第3期
P. 213
!33 " ! 3 # & ' ( ) & * + , - Vol.33No.3
2022 $ 6 % JournalofWaterResources&WaterEngineering Jun.,2022
DOI:10.11705/j.issn.1672-643X.2022.03.27
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8IBJK:S277.9 4 LMNOP:A LQRK:1672643X(2022)03020909
Numericalsimulationoferosiondeformationofrockernozzle
basedonerosioncoupleddynamicmeshmethod
SHENHengfeng,HUANGJianfeng,ZHOUChuanliang
(CollegeofCivilEngineeringandArchitecture,BeibuGulfUniversity,Qinzhou535011,China)
Abstract:Thestructuraldeformationofsprinklernozzlescausedbylongtermerosionandwearisoneof
themainreasonsaffectingthenozzlehydraulicperformance.Inordertoexplorethelawoferosiondeform
ationofnozzlesandtheeffectofdeformationontheirhydraulicperformance ,basedontheerosioncou
pleddynamicmeshmethod ,anumericalmodelofsolid-liquidtwophaseflowofnozzlewasestablished
usingstandardk-ε turbulencemodelandGenericerosionmodelwiththePY1-20shnozzleasthere
searchobject.Thenumericalsimulationofnozzleerosiondeformationwithin160hwascarriedouton
threegroupsofinletflowsunderdifferentsedimentconcentrationconditions.Theresultsshowthatthee
rosionwearmainlyoccursatthemainnozzle ,andthecontinuouserosionwearreducesitsmass,whichin
turncausestheunevenoutwardexpansionofthepipewallandtheincreaseoftheoutletdiameterofthe
nozzle.Thedegreeofdeformationispositivelycorrelatedwiththeservicetimeandsedimentconcentra
tion ,thedeformationrateslowsdownwithtime,andtheenlargedshapecoefficientindicatesthatthe
shapeoftheoutletsectiongraduallydeviatesfromthecircle.Thechangeofnozzlehydraulicperformance
ischaracterizedbyincreasedoutletflowbutdecreasedflowcoefficientduetoerosiondeformation.The
theoreticalanalysisshowsthattherangeofthenozzleisgraduallyshortened ,andthediameterofthewa
terdropattheendisgraduallyreducedwithinasmallrange.Theresearchresultscanprovideareference
fortherationaluseandstructuraldesignofnozzles.
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