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:1672643X(2022)03020909
                        Numericalsimulationoferosiondeformationofrockernozzle
                                basedonerosioncoupleddynamicmeshmethod


                                   SHENHengfeng,HUANGJianfeng,ZHOUChuanliang
                          (CollegeofCivilEngineeringandArchitecture,BeibuGulfUniversity,Qinzhou535011,China)
                 Abstract:Thestructuraldeformationofsprinklernozzlescausedbylongtermerosionandwearisoneof
                 themainreasonsaffectingthenozzlehydraulicperformance.Inordertoexplorethelawoferosiondeform
                 ationofnozzlesandtheeffectofdeformationontheirhydraulicperformance ,basedontheerosioncou
                 pleddynamicmeshmethod ,anumericalmodelofsolid-liquidtwophaseflowofnozzlewasestablished
                 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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