一维CFD模拟仿真设计.doc

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1、.专业整理.CFDsimulationinLavalnozzleSIAE090441313AbstractWeaimtosimulatethequasionedimensionflowintheLavalnozzlebasedonCFDcomputationinthispaper.Weconsiderthechangeofthetemperature,thepressure,thedensityandthespeedoftheflowtostudytheflow.TheanalyticsolutionoftheflowintheLavalnozzleispr

2、ovidedwhentheinputvelocityissupersonic.WeusetheMac-CormackExplicitDifferenceSchemetoslovethequestion.Keywords:Lavalnozzle,CFD,throatnarrow.ContentsAbstract................................................................................................1Introduction.学习帮手..专业整理.......

3、....................................................................................2Simulationofone-dimensionalsteadyflow..........................................3Basisequations...............................................................................3Dimensionless..........

4、.....................................................................10Mac-CormackExplicitDifferenceScheme..................................11Boundaryconditions.....................................................................13Reference..........................................

5、..............................................13Annex..............................................................................................14IntroductionLavalnozzleisthemostcommonlyusedcomponentsof.学习帮手..专业整理.rocketenginesandaero-engine,constitutedbytwotaperedtube,oneshrink

6、tube,anotherexpansiontube.Lavalnozzleisanimportantpartofthethrustchamber.Thefirsthalfofthenozzlefromlargetosmallcontractiontoanarrowthroattothemiddle.Narrowthroatandthenexpandoutwardsfromsmalltobigtotheend.Thegasintherocketbodybythefronthalfofthehighpressureintothenozzle,throughthe

7、narrowthroattoescapebytherearhalf.Thisarchitectureallowsthespeedoftheairflowchangesduetochangesinthejetcross-sectionalarea,theairflowfromsubsonictothespeedofsound,untilacceleratedtotransonic.So,peopleflarednozzlecalledtransonicnozzle.SinceitwasinventedbytheSwedishLaval,alsoknownasL

8、avalnozzle.Analysisofthepr