高比转数双蜗壳混流泵设计及流动特性分析高比转数双蜗壳混流泵设计及流动特性分析

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1、高比转数双蜗壳混流泵设计及流动特性分析高比转数双蜗壳混流泵设计及流动特性分析泵；优化；设计；高比转数；双蜗壳；流动特性；径向力Designandinternalflowfieldanalysisofhighspecificmixed-flowpumpwithdoublevolutesShiWei1,2,LiYanjun1,YuanShouqi1,DengDongsheng2,LiuJun2,ZhangDaqing1(1.NationalResearchCenterofPumps,JiangsuUniversity,Zhenjiang212013,China;2.JiangsuWaterSou

2、rceCo.,Ltd.oftheEasternRouteofSouth-to-NorthWaterDivision,Nanjing210029,China)Abstract:Globalenergyissuesaffecttheeconomicdevelopment,itisthebaseofimprovingnationalstandardoflivingconditions.Accordingtoincompletestatistics,powerconsumptionofpumpsaccountapproximately17％oftotalgeneratingcapacity.Ther

3、ebyincreasingtheefficiencyofthepumpisnecessarytoenergyconservationwhichalsohasaveryimportantsignificanceoncreatingaresource-savingsociety.Mixed-flowpumpsaremoreandmorewidelyappliedtoindustrialandagriculturalproduction,therequirementoftheperformanceofthemixed-flowpumpbecomeincreasinglyhigh.Whenthewo

4、rkingconditiondeviatesfromthedesignedcondition,theflowfiledatimpelleroutletdoesnotmatchwellwiththeflowfieldatvoluteinlet,whichwillleadtotheefficiencydropofmixed-flowpump.Reasonabledesignofmixed-flowpumpimpellerandvolutecanimprovethedistributionofflowfield,andthenimprovethehydraulicperformanceofthem

5、ixed-flowpump.Basedontheoreticalanalysis,numericalsimulationandmodelexperimentresearchmethods,impellerandvolutematchingoptimizationofhighspecificmixed-flowpumpwithvolutewereconducted.Thispaperdevelopedahigh-performancemixed-flowpumpmodelwithdoublevoluteswhosensequalsto585withthetargetofperfectmatch

6、betweenimpellerandvoluteunderdifferentflowrateconditions.Thefullthree-dimensionalnumericalcalculationinternalflowfieldandradialforceoftheoptimaldesignedhighspecificspeedmixed-flowpumpwithdoublevoluteswasinvestigated.Numericalsimulationofthepumpusedthestandardκ-εturbulencemodel.Theκ-εturbulencemodel

7、wasconsideredtobeamodelwhichcanpredictthehydraulicperformanceandsimulatetheinternalflowfieldaccurately.Thecalculationdomaincontainsinletpipe,runner,volute,outletpipe.Andthemeshofinletpipeandoutletpipeadopte