激波作用下R22氣泡射流現(xiàn)象研究.pdf

1、哈爾濱工程大學碩士學位論文激波作用下R22氣泡射流現(xiàn)象研究姓名：關(guān)奔申請學位級別：碩士專業(yè)：熱能工程指導教師：王革20120310AbstractAbstractTheinteractionofshockwaveandgascylinder／bubbleinterfaceisacomplexprocess，becauseofwhichnotonlycontainsthephenomenaofshockrefractionreflecti

2、on，diffractionandscaaering，butalsothegaspropertythatmayinfluencethedevelopmentofthewavestructureJetphenomenonofhighdensitygascylinder／bubbleundershockwaveisveryinteresting，theappearanceofjetstructureishighlyrelatedtothes

3、hockwavestrength，andtherearedifferencesbetweentheietstructuresformedbygascylinderandbybubble，buttheresearchesonietphenomenonisrarelyseen，analysisonthewavestructuredevelopmentisnotclearaSaresult，itisworthwhiletoelucidatea

4、ndanalyzethegascylinder／bubblejetphenomenonTakeR22cylinder／bubbleasanexample，thegascylinder／bubblejetphenomenonundershockwaveiselaboratedThecaseswithorwithoutgasjetphenomenonunderdifferentshockstrengthsarecomparedinorder

5、toexaminethereasonoftheappearanceofjetstructureIntheprogramcodes，Levelsetmethodisappliedtocapturethematerialinterfaces，realghostfluidmethod(rGFM)isusedtodeftnetheinterfacialboundaryconditions，fifthorderWENOschemeaIldthir

6、dorderTVDRungeKuttamethodareemployedtosolvethespmialandtimediscretizationoftheEulerequationsThenumericalsolutionsagreewellwiththeexperimentsAseriesofshockcylinder／shockbubbleinteractioncasesaresimulated，basedonwhichasumm

7、aryismadeonthelawsofjetphenomenonandwavestructurefeaturesintheprocessofjetdevelopmentareconcluded：gascylinder／bubblejetphenomenonundershockwaveappearsonlywithinacertainrangeoftheincidentshockstrength；inthecasesofgasjetph

8、enomenon，ashockwavefocalpointandMachstem／diskappearsanddevelopsinthecylinder／bubble，andimpactsdirectlVonthematerialinterface；butifthewidth／diameteroftheMachstenl／diskexceedsacertainextent，thegasjetfallstoappear；momentoff