航空发动机发展已确认

2021-04-25 13:03:57本页面

航空发动机发展已确认


【正文】

WP14“昆仑”2002年5月20日定型,用于“飞豹”的国产涡扇9发动机“秦岭”通过定型鉴定,2003年7月18日,涡扇10“太行”设计定型,2005年12月28日我国自行研制的“太行”涡轮风扇发动机通过设计定型,标志我国航空发动机研制迈上了新的台阶。,我国研制的发动机,“昆仑”WP14(涡喷14)涡轮喷气发动机“秦岭”WS9(涡扇9)涡轮风扇发动机“太行”WS10(涡扇10)涡扇风扇发动机,我国研制的三种发动机,问题为什么是不同型式的发动机此二型发动机有何不同,各有何特点当前常用的还有哪些发动机涡轮喷气发动机涡轮风扇发动机,涡轮风扇发动机,低涵道比涡轮风扇发动机高涵道比涡轮风扇发动机加力式涡轮风扇发动机。

低涵道比涡轮风扇发动机,20世纪60年代,广泛用于窄体机身的旅客机,如三叉戟,波音707,波音727、波音737200,MD80,图154等。三叉戟波音707,高涵道比涡轮风扇发动机,上世纪70年代初投入使用后,已广泛用于各种类型的旅客机包括干线客机、支线客机。,加力式涡轮风扇发动机,自上世纪60年代研制成功后,已成为现代战斗机的动力装置,并促进了第3代、第4代战斗机的发展,除涡轮喷气、涡轮风扇发动机外还有,涡轮螺旋桨发动机涡轮轴发动机,Boeing787,Boeing787Dreamliner,TheBoeing787,orDreamliner,isamidsizedwidebodypassengerairlinercurrentlyunderdevelopmentbyBoeingCommercialAirplanesandscheduledtoenterservicein2008。

Itwillcarrybetween200and350passengersdependingontheseatingconfiguration,andwillbemorefuelefficientthancomparableearlierairliners.Itwillalsobethefirstmajorairlinertousecompositematerialformostofitsconstruction.PriortoJanuary28,2005,the787wasknownasthedevelopmentaldesignator7E7.OnApril26,2005,oneyeartothedayafterthelaunchoftheprogram。

thefinallookoftheexternal787designwasfrozen1.Withalessrakishnoseandamoreconventionaltail,thefinaldesignhasaerodynamicssuperiortotheinitial7E7concept.Background,ArtistsconceptoftheSonicCruiser,aproposedreplacementforthe767.,When767salesbegantoweakeninthefaceofcompetitionfromtheAirbusA330200inthelate1990s。

Boeingbegantoconsiderareplacement.AstheBoeing747400wasalsobeginningtolosetraction,thecompanyproposedtwonewaircrafttheSonicCruiserandthe747X.TheSonicCruiserwasintendedtoachievehigherspeeds(approximatelyMach0.98)whileburningfuelatthesamerateastheexisting767andA330products.The747X,intendedtocompetewiththeAirbusA380。

wouldstretchthe747400andgiveitacompositesupercriticalwingtoimproveefficiency.Thelimitedpotentialmarketforsuperjumboswasanissue,however;theearlierDouglasDC10andLockheedL1011widebodiessplitasimilarlylimitedmarketanddrovebothcompaniesoutoftheirstrongpositionsinthecommercialaircraftmarket.Marketinterestforthe747Xwastepid。

theSonicCruiserhadbrighterprospects.Severalmajorairlines,primarilyintheUnitedStates,voicedtheiroptimismfortheconcept.Bydecreasingtraveltime,theywouldbeabletoincreasecustomersatisfactionandaircraftutilization.IntheaftermathoftheSeptember11,2001attacks,theglobalairlinemarketwasupended.Airlineswerenotabletojustifylargecapitalexpenditures。

andduetoincreasedpetroleumprices,weremoreinterestedinefficiencythanspeed.TheworstaffectedairlineswereintheUnitedStatesthosesameairlineswereconsideredtobethemostlikelycustomeroftheSonicCruiser.Boeingproceededtoofferairlinestheoptionofusingtheairframeforeitherhigherspeedorincreasedefficiency.Duetohighprojectedairframecosts。

demandcontinuedtoevaporate.Eventually,Boeingswitchedtracksanddecidedtoofferanalternativeproject,cancellingthe747XonceAirbuslaunchedproductionoftheAirbusA380aircraft.,Artistsconceptofthe7E7thatshowsthenoseandtailpriortothefinal787redesign;liveryoflaunchcustomerAllNipponAirways.,ThereplacementfortheSonicCruiserprojectwasdubbedthe7E7(withadevelopmentcodenameofY2。

)TheEwassaidtostandforvariousthings,dependingupontheaudience.Tosome,itstoodforefficiency,toothersitstoodforenvironmentallyfriendly,etc.Intheend,BoeingclaimeditmerelystoodforEight,aftertheaircraftwaseventuallyrechristened787whenseveralChineseairlinesorderedtheproduct.EightisaluckynumberinmanyAsiancultures。

anditwasthoughtbysomethatBoeingseizeduponthiscoincidenceasamarketingtool.2The787essentiallyusesthetechnologyproposedfortheSonicCruiserinamoreconventionalairframeconfiguration(seeFeatures).Boeingclaimsthatthe787willbeupto20%morefuelefficientthancurrentcomparableaircraft.Roughlyonethirdofthisefficiencyimprovementwillcomefromtheengines。

anotherthirdfromaerodynamicimprovementsandtheincreaseduseoflighterweightcompositematerials;andtherestfromadvancedsystems.Themostnotablesystemadvancementcontributingtoefficiencyisamoreelectricarchitecturewhichreplacesbleedairandhydraulicpowerwithelectricallypoweredcompressorsandpumps.TechnologyfromtheSonicCruiserand787willbeusedaspartofBoeingsprojecttoreplacetheirentireairlinerproductline。

calledtheYellowstoneProject(ofwhichthe787isthefirststage).Boeingselectedtwoenginetypes,theGeneralElectric(GE)GEnxandRollsRoyceTrent1000topowerthe787.Significantly,thisleavesPrattbycomparison,the747sold92unitsduringthesametimeperiod.Boeingexpectstohave500ordersbyentryintoservice(EIS).The7873and7878variantswillbeavailablefirst。

The7879wasexpectedtobeavailabletwoyearslater,butthefirst2.5yearsproductionhasnowbeensoldoutfortheinitialvariants,sotheintroductionofthe7879hasbeendelayedinordertofulfillinitialdemand.AsofMay1,2006,threeairlineshadalreadyorderedatotalof39Boeing7879.The7878variantwaspricedatalistpriceof$US120millionperaircraft。

surprisingtheindustry,whichwasexpectingamuchhigherpricetag.Therehavebeentwopriceincreasessincelaunchanda7878currentlysellsfor$US148157.5million.Likelaunchcustomersofpastaircraft,ANAisrumoredtohavereceivedasignificantdiscountofaround4050%offtheoriginalprice.Thismayneverbeeasilyconfirmed,butthepracticeisverycommonintheaviationindustry。

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