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Studyonoptimizationofsedimenterosionperformancefor
centrifugalpumpimpellerbasedoninversedesignmethod
2,3
2,3
1,2
3
ZHANGZichao ,LIJun,GUANTingyue ,LIYanpin ,ZHANGLanjin 3
(1.EngineeringTrainingCenter,NorthChinaUniversityofWaterResourcesandElectricPower,Zhengzhou 450045,China;
2.HenanFluidMachineryEngineeringTechnologyResearchCenter,NorthChinaUniversityof
WaterResourcesandElectricPower ,Zhengzhou 450045,China;
3.CollegeofEnergyandPowerEngineering,NorthChinaUniversityofWaterResourcesandElectricPower,
Zhengzhou 450045,China)
Abstract:ThecentrifugalpumpiswidelyusedinpumpstationalongtheYellowRiverinChina.Theerosionprob
lem ofcentrifugalpumpcausedbythesedimentintheYellowRiverseriouslyaffectsthesafeandefficientoperation
ofthecentrifugalpump.Theinversedesignisapopularmethodtoimprovetheperformanceofcentrifugalpump,
buttheeffectofbladeloadingmodeasakeydesignparameteronerosionperformanceisstillunclear.Inthispa
per ,inordertosolvetheproblemoftheinfluenceofbladeloadingmodeonthesedimenterosioncharacteristicsof
centrifugalpumpimpeller ,theeffectsofthreedifferentbladeloadingmodeswhichareload - frontforshroudand
load - backforhub,load - middlebothforshroudandhub,load - backbothforshroudandhubonthehydraulic
performanceofcentrifugalpump ,theerosioncharacteristicsofimpellerandtheflowfieldcharacteristicsofsolid -
liquidtwo - phaseflowarestudiedbyusingthenumericalcalculationmethodofsolid - liquidtwo - phaseflow.The
resultsshowthatthehydraulicperformanceofthecentrifugalpumpobtainedbyschemeofload - middlebothfor
shroudandhubisbettercomparedwithotherschemes.Undervariousoperationconditions,themaximum erosion
rateofthebladeobtainedbyschemeofload - middlebothforshroudandhubisreducedby25%~73%.Itcanbe
reducedby73% undersmallflowconditionand25% underlargeflowcondition.Theerosionperformanceofthe
bladefromscheme2issignificantlyimproved.Comparedwiththeoriginalimpeller ,thepressuredistributionsof
thethreeoptimizationschemesonthesuctionsurfacestreamlinesoftheshroudaremoreuniformandsmooth.Under
theconditionoflowflowrate ,thesolidvolumefractionsonthebladesurfacesofload - middlebothforshroudand
hub ,load - backbothforshroudandhubaresmall.Thevelocitydistributionsonthebladesurfacesofallschemes
arebasicallythesame.Undertheratedflowcondition ,thesolidvolumefractiononbladesurfaceoftheoriginal
impellerissmall.Theregionswithhighsolidvelocityonthebladesurfacesofload - middlebothforshroudand
hub,load - backbothforshroudandhubarerelativelysmall,andthesolidvelocitiesarealsodecreased.There
fore ,thehydraulicperformanceanderosioncharacteristicofschemeofload - middlebothforshroudandhubare
better ,whichcanbeprovidedasareferencetooptimizetheerosioncharacteristicofthecentrifugalpump.
Keywords:inversedesignmethod;centrifugalpump;solid - liquidtwo - phaseflow;sedimenterosion;optimiza
tiondesign
(责任编辑:王 婧)
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