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1、基于推力矢量的先进概念飞机飞发一体气动研究ABSTRACTAircraft/engineintegrationistheinevitabledevelopmenttrendforthemodernandfuturefighters.
Theaimoftheintegrationisthestudyoftheinteractionbetweentheaircraftandengine,inorderto
reducetheadverseeffectsandgetabetteraircraft/enginematch
2、ingperformance.Thehighlyblended
fuselagelayoutandhighefficientthrust-vectoringtechniquearethemaintendencyforthefuture
fighterandunmannedaircraftwhichhashighstealthperformance.Basedontheanalysisof
one-dimensionalflow,CFDnumericalsimulation,thearticlehasaprelim
3、inarystudyontheintegrated
aircraft/engineaerodynamicperformanceofaclassofthefutureconceptfighter.First,referencetoamodelofoneadvancedconceptfighterandit’saerodynamicperformanceof
aircraftengineintegration,byaddingtheincidentangleofwing,blendingwing-to-fuselag
4、eand
nozzle-to-afterbody,themodelhasbeenimproved.Referencetocomputingprogramforthemixed
exhaustturbofanenginesteady-stateperformanceunderthethrustrequirementoftheaircraft,this
articledeterminesthespecificcross-sectionalperformanceparametersoftheengineandtheba
5、sic
dimensionsofitspropulsionsystemsflowpath;thendesignsastealthsupersonicbumpinletbasing
onrelevantdesignprogramandarelativelybetteraerodynamicperformanceaxisymmetricnozzle
usingageometricapproximationmethod.Second,thearticlegivesapreliminaryresearchontheaer
6、odynamicperformanceofthemodified
aircraftmodelwiththeCFDnumericalsimulation,andtheanalysisofitsliftanddragcharacteristics.
Moreover,thearticleresearchestheaerodynamicperformanceoftheengineandtheintegrated
installationofaircraft/propulsionsystemof,andalsocompa
7、restheflowfieldanalysiswithand
withouttheengineinstallation.Theresultsshowthatthereisobviousshockwavedragandfriction
dragonthefuselageandwing,alargeeddyandlowstaticpressureareaonthebottomofthefuselage,
andalargedragatthebottomofthefuselagewithouttheinstallati
8、onoftheengine.Afterthe
installationoftheengine,thetotalliftanddragofthefighterareincreased,thedragatthebottomis
diminishedobviously,buttheflowcoefficientoftheinlet,thetotalpressurerecover
