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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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