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1、NumericalSimulationofFlowFieldinaCentrifugalPumpwithInducerWeiChao1ZhongWeicong2ZhangFeng21.CollegeofAstronautics,NorthwesternPolytechnicalUniversity,Xi’an710072,China2.Xi’anAerospacePropulsionInstitute,Xi’an710100,ChinaAbstract:BasedontheN-SEquationandthenon-structuredmeshtechnology,the3
2、Dsteadyincompressibleturbulentflowwithinacentrifugalpumpwithinducerwassimulated.Theinternalstaticpressuredistribution,velocitydistributionandthedeliveryheadwereobtained.Moreover,cavitationwasalsoanalyzed.Thenumericalresultsshowthatcavitationmainlyhappensattheouteredgesoftheentrancebladesa
3、ndtherootsoftheexitbladesintheinducer,thehubentranceandtherootsofpartbladesinthecentrifugalwheel.It’sfoundthatcavitationisrelatedwiththeassemblyangleoftheinducerandcentrifugalwheel.Thenumericalresultsagreewiththeexperimentaldataverywell.Keywords:inducer;centrifugalpump;numericalsimulation
4、;cavitation1IntroductionThedeliveryhead,massflux,efficiencyandcavitationperformanceofpumpareimportantforthedesignofturbopump-fedliquidrocketengine.Theprepositiveinducerisusuallyusedtoimprovethecavitationperformanceofcentrifugalpump.IntheconventionalR&Dmodeofpump,therelationshipsofperforma
5、nceparametersandstructureareestimatedbyempiricalformulae.Asaresult,it’sdifficulttocontroltheR&DdurationandR&Dcost.WiththedevelopmentofCFDtechnology,theparameters,suchasvelocity,pressureandcavitationdegree,canbeobtainedbynumericalsimulationmethod.Themethodisprovedvalidandbecomesmoreandmore
6、importantintheR&Dprocessofpump.Thepapersimulatedthe3DsteadyincompressibleturbulentflowwithinacentrifugalpumpwithinducerusingCFDmethod.Theinternalstaticpressuredistribution,velocitydistributionandthedeliveryheadwereobtained.Moreover,thecavitationwasalsoanalyzed.2Modeling2.1Governingequatio
7、nsInthepaper,the3Dsteadyincompressibleturbulentflowwithinthecentrifugalpumpwassimulatedwiththestandardturbulentmodel.Thegoverningequationsareasfollows[1-3]:2.1.1Continuityequation(1)2.1.2Momentumequation(2)第5页共5页Theturbulencekineticenergy,,anditsrateofdissipation,,a