可燃氣體中激波聚焦的數(shù)值模擬.pdf

1、分類號密級學位論文可燃氣體中激波聚焦的數(shù)值模擬唐敖(作者姓名)指導(dǎo)教師姓名董型割墼蕉申請學位級別碩士專業(yè)名稱墊鰹?zāi)照撐奶峤蝗掌?QQ5=亙：5論文答辯日期——學位授予單位和日期由室壟墨盤鱟答辯委員會主席評閱人年月日注l：注明《國際十進分類法UDC))的類號。———————————————————————————～—————————————————_————————————————————————————————————————_———

2、—————————_——一AbstractAsapartoftheproject“enhancementmechanismoffocusingshock—flameinteractionsondeflagration—todetonationtransition”，thenumericalinvestigationwascarriedouttostudyinddemshockwavefocusingonparabolicreflecto

3、rinCHdAIRmixtureThemulti—component，reactive，two—dimensionalaxisymmetricEulerequationswereemployedtosimulatetheprocessThemodifiedhi【曲一resolutionwavepropagationalgorithmwasadoptedtosoNetheconvectiontermoftheequationsAdetai

4、led19stepchemicalmechanismofCIh／A／RwasusedtosolvethechemicalsourcetermThenaprogramwasextendedtosimulatetheprocessofshockwavefocusingonparabolicreflectorinCH4／AIRmixtureThecomputationalresultswerecomparedwiththeexperiment

5、alresults，andthereasonableagreememsareobtainedThecomputationalmodeliSthenextendedtostudytheeffectsofcontrolledparameters，suchasincidentshockwaveMachnumberdepthofthereflectorandthechemicalactivityofthemixture，onthecombust

6、ionmodeafterthefocusingAndthechangesoftheflowstructurewerealsoinvestigatedThecomputationalresultsshowedthatthethreedifferentpatterns，namelynoignitmnmode，deflagrationmodeanddetonationmodecouldoccurwiththevariationofthesep

7、arametersStrongincidentshockwave，deepreflectorand，orhighchemicalactivityofmixturetendtogeneratedetonationinthecombustiblegaseousmixtureKeywordsshockwavefocusing；shockwavereflection；detonation；deflagrationnumericalsimulat