Experimentandnumericalsimulationforhighpressurecombustiblegasjet

expansionprocessinabulk-loadedliquid

MANG Shan-shan; YU Yong-gang

doi:10.11883/1001-1455(2011)03-0300-06

Volume 31 Issue 3

May 2014

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MANG Shan-shan, YU Yong-gang. Experimentandnumericalsimulationforhighpressurecombustiblegasjet expansionprocessinabulk-loadedliquid[J]. Explosion And Shock Waves, 2011, 31(3): 300-305. doi: 10.11883/1001-1455(2011)03-0300-06

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Experimentandnumericalsimulationforhighpressurecombustiblegasjet expansionprocessinabulk-loadedliquid

doi: 10.11883/1001-1455(2011)03-0300-06

MANG Shan-shan^,,
YU Yong-gang

1.
SchoolofScience,NanjingUniversityofScience& Technology,
2.
Nanjing210094,Jiangsu,China;

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Corresponding author: MANG Shan-shan
Publish Date: 2011-05-25

Abstract

Abstract

Inordertoinvestigatetheexpansioncharacteristicsofthehighpressurecombustiblegasjet inabulk-loadedliquidandtoexplorethecontrolmethodsforimproveingthejetstability,acylindrical four-stagestepped-wallchamberwasdesigned.Usingahigh-speedkinescopesystem,theexpansion andmixingprocessofthegasjetintheliquidwasobserved.Aseriesofphotosdescribingjetexpansionform wereobtained,theexpansionvelocityoftheTaylorcavitywasmeasuredandtheeffectsof thechamberwallshapeonthejetexpansionwerecompared.A2-Daxisymmetricgas-liquidtwo-phase turbulentflow modelwasdevelopedtosimulatethejetexpansionprocess.ThecalculatedjetexpansionshapeandexpansionvelocityoftheTaylorcavitywereconsistentwithexperimentalresults. Obtainedresultsshowthatvortexemergesatthechambersteps, whichinducesthejettoexpandradially thenrestrainsKelvin-Helmholtzinstability.Thestepped-wallchamberboundarycanimprovethejet stability.
- fluidmechanics,
- combustible-gasjet,
- turbulentmixing,
- gas-liquidinteraction

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