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增压器叶轮的超速破坏试验研究.docx

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增压器叶轮的超速破坏试验研究 Title:ExperimentalStudyonOver-SpeedDestructionofTurbochargerImpellers Introduction: Turbochargersareincreasinglyusedinmoderninternalcombustionenginestoenhancetheirperformancebyincreasingtheintakeairpressure.Centraltotheturbochargersystemistheimpeller,whichisresponsibleforcompressingtheairanddeliveringittotheengine.However,undercertainoperatingconditions,turbochargerimpellerscanexperienceover-speed,leadingtocatastrophicfailureandsignificantdamage.Thispaperaimstopresentanexperimentalstudyontheover-speeddestructionofturbochargerimpellers. 1.Background: Turbochargerimpellersaretypicallysubjecttorotationalspeedsthatrangefromtensofthousandstohundredsofthousandsofrevolutionsperminute,dependingontheenginesizeandintendedapplication.Factorssuchasexcessiveboostpressure,componentfailure,ormanufacturingdefectscancausetheimpellertorotatebeyonditsoperationallimits,resultinginover-speedandimpendingdestruction.Understandingthefailuremechanismiscrucialfordesigningrobustturbochargersystems. 2.LiteratureReview: Severalstudieshavebeenconductedonturbochargerimpellerfailures.Mostoftheseinvestigationshavefocusedonfailureanalysisofdamagedimpellers,providinginsightsintothefailuremodesandpossiblecauses.Theexistingliteraturelackscomprehensiveexperimentalstudiesexplicitlydesignedtodeterminethecriticalrotationalspeedthatleadstoimpellerdestruction.Thisresearchaimstofillthisgapbyconductingsystematicover-speedtestsonturbochargerimpellers. 3.ExperimentalSetup: Theexperimentalsetupconsistsofadedicatedtestbenchspecificallydesignedtosimulateturbochargerconditions.Thetestrigincludesanadjustablespeeddrive,adynamometer,anairsupplysystem,andsensorsformeasuringimpellerrotationalspeed,pressure,andtemperature.Severalturbochargerimpellerswillbetested,representingawiderangeofsizesanddesignscommonlyusedintheautomotiveindustry. 4.Methodology: Thestudywillfocusonsubjectingtheimpellerstoprogressivelyincreasingrotationalspeedsuntildestructionoccurs.Theimpellerrotationalspeedwillbecontinuouslymonitored