2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Thesummaryfthrustfcevecttechnology1.Outlihethrustfcevecttechnologyisreferstothemotpowerthethrustfcecomponentwhichproducesthroughthenozzleeitherthetailjetdeflectiontosubstitutetheiginalairplanethecontrolsurfacestrengthens

2、theairplanetheoperationfunctioncarriesontherealtimecontroltotheairplaneflightthetechnology.Toitsapplicationbutalsomustdependupontechnicalthesooncomputerelectronictechnologyautomaticcontroltechnologyenginemanufacturetechn

3、ologymaterialcraftintegrateddevelopment.Usingthethrustfcevecttechnologytothenewdesignonthemodificationnextcenturymilitaryairplaneindeedisaneffectivetechnicalbreachittothefighteraircraftstealthreducesantireducesweightextr

4、emelyisalleffective.ThethrustfcevecttechnologycanletthemotpowerapartturnthecontrolfcereplacespartiallyreplacesthecontrolsurfacethusgreatlyreducedtheradarreturnareaNomattertheangleofattackbigtheflyingspeedismuchlowtheairp

5、laneallmayusethispartofcontrolfcetocarryontheoperationthisincreasedtheairplanecontrolliability.Becausedirectlyhasthecontrolfcesizedirectioninstablealsoincreasedtheairplaneagilitythusmaysuitablyreduceremovetheverticalstab

6、ilizeralsocansubstituteothersomecontrolsurfaces.Thistoreducestheairplanetobepossiblethesurveytobeadvantageousalsocancausetheairplanetheresistancetoreducethestructurereducesagain.Therefetheusethrustfcevecttechnologysolves

7、thedesigncontradictybestchoice.HaspermittedfmanyyearscountrysoonAmericaRussiahasperfmedthemassiveperfmanceflighthadprovenusingthethrustfcevecttechnologyindeedcanachieveprearrangesgoal.AfterinApril1991theGulfWarendedthePe

8、ntagonputsout50billionUSdollarsthedevelopmentisdifferentwiththeF117newstealthairplanehasusedthethrustfcevecttechnologythereuponhadhasbasicallysatisfiedtheabovemanykindsofrequeststheF22fighteraircraft.TheRussiandevelopmen

9、tstealththethrustfcevecttechnologyappliedresearchincludestheMig1.44theaircurrentreactingfcewhichsendsouttothedifferentdirectionmayrapidlychangethedirectionusingtheengine.“JanesDefenseWeekly“in1992saidtheRussianhadalready

10、surmountedF117directlydevelopedthemodernsupersonicspeedattackairplanehasbecometheF22competit.2Technicalclassificationtoairplaneoverallperfmanceinfluenceeffuser(2DCDN)thepureinflationpitchnozzle(SERN)thedualwedgewritingst

11、ylenozzle(2DWN)skidsthethroattypenozzle(STVN)thesphericalsurfacerestrainsadjuststhenozzle(SCFN)soon.TheresearchconfirmedthatDualvectnozzlethrustvectiseasytoachieve.theendofthe80sAmericantwoadvancedresearchfighteraircraft

12、sYF22F119YF23F120haveusedthiskindofvectnozzle.Thedualvectnozzleshtcomingisthestructurequiteunwieldyflowsintheacteristictobewse.2.3AxialsymmetryvectnozzleThethrustfcevecttechnologyresearchconcentratesatfirstinthedualvectn

13、ozzlebutalongwithresearchthoughdiscoverytwodimensionalnozzlemeritalthoughmanybutshtcomingalsoveryobvioustransplantsinparticulartotheoperatingaircraftonisquitedifficult.Therefehasdevelopedtheaxialsymmetrythrustfcevectnozz

14、le.GECpationstartstheaxialsymmetrythrustfcevectnozzledevelopmentinthe1980sintermediatestagesitsdevelopmentnozzlechangestheadjustmentby3A94A8throatareaadjustment3adjustableringsconstitutionsoonsupptingganizationnozzlecont

15、rolvalveaswellasgroupofheatresistingsealspieces.2.4FlowfieldthrustfcevectnozzleTheflowfieldthrustfcevectnozzleiscompletelydifferenttothefrontseveralkindofmachineriesdoesmovesthetypethrustfcevectnozzleitsmainacteristiclie

16、sinthrough(SecondaryFluid)affectsthemainstreaminthenozzledivergentsectionintroductionlateralinferiaircurrenttheconditionachievesthechangethecontrolmainstreamareathedirectionthengainthrustfcevectgoal.Itsmostmainmeritwassa

17、vesthemachinerywhichthemassiveimplementationsthrustfcevectusedtotransptsimplifiedthestructurereducedtheairplaneweightreducedthemaintenancecost.Therealizationflowfieldthrustvectcontrolhasthemanykindsofwaysbelowatpresentst

18、udieshastheway:（1）jetthrustvectcontrol.Bytheaircurrentafterthenozzledivergentsectionmanyinjectionsthefcemainstreamattachesdependsonflowstoontheoppositesidewallsurfacethusproducestheside.?。?）regurgitationthrustvectcontrol

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