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1、SpaceEurope.................................................................7.,.,._..............................................................RESEARCH:....&........TECHNOLOGY......................................ENIFAIR-EUResearchintoEngineIntegrationonFutureTra
2、nsportAircraftWolfgangBURGSMULLER,HeinzHOHEISELFollowingonfrompreviousEUresearchprogrammes,EMFAIRhasextendedthestudyofengine-airframeaerodynamicintegrationproblemstothecasesofVeryHigh-andUltraHigh-BypassRatioengineinstdafionsonrepfesentutivemodemaircruff.Thisarticl
3、eprovidesanoverviewoftheworkcarriedoutandpresentsexamplesoftheresultsachieved.Europeancooperativeresearchtotalefficiency,beingtheproductofthelationandinterferencedrag,buttheprogrammeinthefieldofae-propulsiveefficiencyandthethermallevelofthenacelledraginfluencesther
4、odynamicengine/airframeefficiencyoftheengine,showsthattheoptimumbypassratio(figure1)..integrationwasstartedinlargerpotentialforimprovementist1990underthenameDUPRINattainedbyincreasingthebypassratio(DLJctedPRopfanINvestigation).Itwas(BPR).Thismeanshavinglargerengine
5、ProgrammeobjectivescarriedoutaspartoftheEuropeandiametertoincreasetheairmassflowInviewoftheimportanceofengine-air-UnionsresearchFrameworkProgramme.throughtheby-passductrelativetoframeinterferenceeffectsforadvancedAfteritssuccessfulcompletion,afollow-thatthroughtheh
6、otinnercoreofanenginetypescurrentlyunderdevelop-upphase,DUPRIN2,startedin1994engine,withthepotentialofreducingmentforfuturetransportaircraft,theandwasfollowedbythepresentpro-thefuelconsumptionupto15%,combi-mainpurposeoftheEuropeanresearchgramme,ENIFAIR(ENgineIntegr
7、ationnedwithloweremission.Theseengines,programmeENIFAIRistoprovidetheonFuturetransportAIRcraft),whichhowever,mustbeinstalledonaircraft,so18partners(figure2)fromindustry,hasbeenrunningsince1996andwillbeabalancehastobeachievedbetweentheresearchestablishmentsanduniver
8、sitiescompletedinMarch2000.engineefficiencyandAscommercialaviationcontinuestothatoftheon-aircraftPresentTurbofansgrowthereisincreasingpressureupo
