炮射固沖發(fā)動(dòng)機(jī)絕熱層傳熱燒蝕仿真與試驗(yàn)研究.pdf

1、南京理工大學(xué)碩士學(xué)位論文炮射固沖發(fā)動(dòng)機(jī)絕熱層傳熱燒蝕仿真與試驗(yàn)研究姓名：曹軍申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：航空宇航推進(jìn)理論與工程指導(dǎo)教師：陳雄20090526Abstract碩士論文AbstractAsthedevelopmentoftechnologyandtheusingofnewpropulsionheatsafetyplaysmoreandmoreimportantroleThispaperpresentedthestudyonthe

2、processofinsulatorerodedbydifferentshapetheresultadvancedourunderstandingoftheruleofinsulatorablationandinvestigatedablationmechanismfromexperimentalandtheoreticalaspectsThecontentofthisthesiscanbedividedintothreeparts：(

3、1)Threedimensionalcombustionandflowfieldsinsecondarycombustionchambererodedbydifferentshapeswerenumericallysimulatedonthebasisofthek一￡turbulentmodel，simplereactflowandradiationtransfermodelTheconclusioncanbedeclaredthatt

4、heflowfieldcontainsheadrecirculationandaxisvortexthatrelateconstructionofcombustorWiththeincreasingofaxisangleODtheconditionthataxislocationisfixed，theinfluencecausedbyshapesonfluidincreasefirstlyandthendecrease(2)Accord

5、ingtothegivenboundaryconditionnumericalsimulationoftheprocessofinsulatorerosioninsecondaryCombustionChamberwasconductedTheresultincludedthetemperaturefieldandthestressfieldBasedonthistemperature，whetherornotinsulatorlaye

6、rbeenablatedWasdecidedTheevolutionaryprocessoftheconcaveWassimulatedsuccessfullybythenumericalcalculating，andthetrendisinagreementwithexperiment(3)TheinsulatorerosionWasstudiedexperimentallybyusingtheexperimentsystemofSR

7、MThephenomenoncouldbefoundthattheshapeoftheconcavepithasrelationtothetimeWiththeincreasingoftimetheregionexpandsandtheerosionrateincreasesInadditionvirginmateriallayerpyrolysislayerandcharredlayerweredistinguishedwhenthe