火焰在激波誘導(dǎo)下穩(wěn)定性問題的數(shù)值模擬與實(shí)驗(yàn)驗(yàn)證.pdf

1、南京理工大學(xué)碩士學(xué)位論文火焰在激波誘導(dǎo)下穩(wěn)定性問題的數(shù)值模擬與實(shí)驗(yàn)驗(yàn)證姓名：靳建明申請學(xué)位級別：碩士專業(yè)：工程熱物理指導(dǎo)教師：董剛20040601AbstractAsapartoftheNSFCproject“enhancementmechanismoffocusingshock—flameinteractionsondeflagrationto—detonationtransition’，thetheoreticalanalysis，

2、numericalsimulationsandexperimentalvalidationsarecarriedouttostudytheflameinstabilitiesinducedbyshockflameinteractionsSometheoryresearchaboutshockflameinteractionstabilityisdiscussedSomeresearchaboutthegenerationanddevel

3、opmentofvorticityandthedistortionofedgeoflightgasballisdoneTheRichtmyerMeshkovinstabilityisanalyzedTheKelvin—Helmholtzinstabilityinducedbysmalldisturbinthetwounmixedfluidinterfaceisdiscussedbymeansoftheestablishedmathema

4、ticalmodelAndfivephasesofinstabilitiesdevelopmentareintroduced，especially’thenonlinearityprocessoftheinstabilitiesisanalyzedAnumericalmodel，intermsoftwo—dimensionalmulticomponentaxisymmetficEulerequationscoupledwithachem

5、icalreactionsourceterm，WasconstructedAsplitting—operatortechnologywasusedtosolvetheequations乃egasdynamicequationsweresolvedbyusingthesecond—orderwavepropagationmethod，andthechemicalreactionsourcetermofmethaneairissolvedb

6、yusingachemicalkineticmechanismincluding19一elementreactionsand14speciesBaseduponmethodsconstructedabove，theinteractionsbetweentheincidentshockwaveandflamebubbleandbetweentllereflectedshockwaveanddistortedflameforCH4／airm

7、ixturewereinvestigatednumericallyTheevolutionandpropertiesofflameinstabilityinducedbyincidentandreflectedshockwaveswerediscussedinaccordingtocomputationalresultsThecomputationalresultswerecomparedwi山theexperimentalresult