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23Vol.47No.12014DevelopmentofPW1100G-JMTurbofanEngineSATOAtsushi:DeputyGeneralManager,PW1000G-JMDepartment,JapaneseAeroEnginesCorporationIMAMURAMitsuo:GeneralManager,PW1000G-JMDepartment,JapaneseAeroEnginesCorporationFUJIMURATetsuji:GeneralManager,EngineeringDepartment,CivilAero-EngineDivision,Aero-Engine&SpaceOperationsThePW1100G-JMisoneofthenext-generationturbofanenginesselectedtopowertheAirbusA320neo(NewEngineOption).IHIparticipatedinthePW1100G-JMprogramasamembercompanyoftheJapaneseAeroEnginesCorporation(JAEC).ThePW1100G-JMadoptstheGearedTurboFan(GTF)systemanddeliversimprovementsinfuelefficiency,emissions,andnoisebyapplyingstate-of-the-artcompositematerialsandcomponenttechnologies.ThispaperpresentsanoverviewofthePW1100G-JM.1.IntroductionAirbus(France:AirbusSAS)iscurrentlydevelopingtheA320neo(NewEngineOption),andisaimingtoachievea15%higherfuelefficiency,adouble-digitreductioninNOxemissions,anda50%reductioninairframenoisebyreplacingtheengineoftheA320currentlyinservicewiththatofastate-of-the-artdesignandkeepingtheairframeconvertingcosttoaminimum.Figure1illustratesanext-generationnarrow-bodycommercialaircraftAirbusA320neo.ThePW1100G-JM(Fig.2)hasbeenselectedasoneoftheenginestobeinstalledontheA320neo.DevelopmentofthisenginebeganasaninternationalcollaborativeprojectunderIAE,LLC,aconsortiumofPratt&Whitney(P&W,USA),theJapaneseAeroEnginesCorporation(JAEC),andMTUAeroEnginesHoldingsAG(MTU,Germany).IHIparticipatedintheprojectasamembercompanyofJAEC.Inaddition,JAECisdevelopingthisenginewithfinancialassistancefromtheInternationalAircraftDevelopmentFund(IADF).ThePW1100G-JMadoptsaGearedTurboFan(GTF)systemwithanadvancedgearsystem,andthebypassratiohasbeenincreasedtoapproximately12toachievehighpropulsionefficiency.Furthermore,state-of-the-artcompositematerialsandcomponenttechnologieshavebeencombinedtodeliverimprovementsinfuelefficiency,emissions,andnoise.ThispaperpresentsanoverviewofthePW1100G-JMdevelopmentprogram,aswellastheengineeringfeaturesofthecomponentsbeingdevelopedbyIHI.2.OverviewofPW1100G-JMdevelopment2.1DevelopmenthistoryTheA320neofamilyofnarrow-bodyaircraftbeingdevelopedbyAirbusprovidesgreatimprovementsincosteffectivenessandenvironmentalfriendlinessbyreplacingtheenginesoftheexistingA320aircraftfamily(theV2500andtheCFM56)withstate-of-the-artengines.A320neoaircraftarescheduledtoenterintoserviceinthefourthquarterof2015.Meanwhile,majorAmericanandEuropeanenginemanufacturersproposedtheirownnewenginedesigns,andinDecember2010,thePW1100G-JMbyP&WandtheLEAP-1AbyCFMInternational(ajointventurebetweenSnecmaofFranceandGeneralElectricoftheUnitedStates)wereselected.Creatingthesenewenginesrequiresthelatesttechnologiesinordertomeetstringentdemandswhileensuringsafety.InlightofthepositiongiventoPW1100G-JMasaV2500successorengine,P&WaskedJAECandMTU,co-partnersintheV2500internationalcollaborativeproject,(Imagecredit:Airbus)Fig.1AirbusA320neoaircraft(Imagecredit:P&W)Fig.2PW1100G-JMcutawayview(1)TechnicalArticles24Vol.47No.12014toparticipateinthedevelopmentwork,basedontheirpastachievementsandlatesttechnologies.AfterdetaileddiscussionswithP&WandMTU,JAECdecidedtoparticipateinthedevelopmentwork,andthecompaniessignedajointagreementinSeptember2011.JAECiscontributing23%ofthePW1100G-JM(thesameshareaswiththeV2500),andisresponsibleforthefan,lowpressurecompressor,lowpressureshaft,andpartofthecombustor.MTUhasan18%share,andisresponsibleforthelowpressureturbineandpartofthehighpressurecompressor,whileP&Wisresponsibleforallothercomponents.IHIisresponsibleforthemainfanmodulepartsintheV2500program,andhasa60%shareoftheJapanesecontribution.Forthenewengine,IHIisresponsibleforthemainfanmodulepartsaswasthecasefortheV2500,andhasa65%shareoftheJapanesecontribution.2.2PredictedmarketvolumeInthepresentmarketfornarrow-bodyaircraftinthe120-220seatclass,approximately12000existingmodelssuchastheBoeing737andtheAirbusA320areinservice.Whentheagesoftheseaircraftaretakenintoaccount,itisbelievedthatthemarketvolumeoverthenext20yearsforthisclasswillshowareplacementdemandofapproximately6000ofthe12000aircraftcurrentlyinservice.Furthermore,newdemandduetomarketgrowthinthisclassisanticipated,andthevolumeoftheoveralldemandisexpectedtoreach15000aircraftormore.Currently,AirbusisconductingdevelopmentoftheA320neoasanaircraftforthismarket.Inthefuture,inadditiontoexistingaircraftsuchastheBoeing737,newmodelssuchasthe737MAXareexpectedtoenterthemarket,andnewcompetingdesignsmayalsobedeveloped.AirbusisalsoconsideringputtinganA320successorwitharedesignedairframeonthemarketaround2025.Assuminga14-yearsalesperiod(from2015to2028)fortheA320neo,evenaconservativeestimateofthemarketvolumefornarrow-bodyaircraftduringthisperiodisapproximately7000aircraft.IftheA320neoreceivesordersforapproximatelyhalfofthismarket,ordersforapproximately3500aircraftwouldbeacquired,andassumingthatthePW1100G-JMisselectedastheengineforhalfofthose,demandforapproximately3500enginesisenvisioned.2.3EnginespecificationsTable1illustratesthemajorspecificationsofthePW1100G-JMascomparedtotheV2500.ByraisingthebypassratioabovetheV2500,the