Experimentalandnumericalinvestigation

oncellularpatternsofrotatingdetonations

ZHANG Xu-dong; FAN Bao-chun; PAN Zhen-hua; GUI Ming-yue

doi:10.11883/1001-1455(2011)04-0337-06

Volume 31 Issue 4

May 2014

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Article Navigation > Explosion And Shock Waves > 2011 > 31(4): 337-342

ZHANG Xu-dong, FAN Bao-chun, PAN Zhen-hua, GUI Ming-yue. Experimentalandnumericalinvestigationoncellularpatternsofrotatingdetonations[J]. Explosion And Shock Waves, 2011, 31(4): 337-342. doi: 10.11883/1001-1455(2011)04-0337-06

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ZHANG Xu-dong, FAN Bao-chun, PAN Zhen-hua, GUI Ming-yue. Experimentalandnumericalinvestigation oncellularpatternsofrotatingdetonations[J]. Explosion And Shock Waves, 2011, 31(4): 337-342. doi: 10.11883/1001-1455(2011)04-0337-06

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Experimentalandnumericalinvestigation oncellularpatternsofrotatingdetonations

doi: 10.11883/1001-1455(2011)04-0337-06

1.
LaboratoryofTransientPhysics,NanjingUniversityofScienceandTechnology,

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NationalNaturalScienceFoundationofChina(10872096)

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Corresponding author: FAN Bao-chun
Publish Date: 2011-07-25

Abstract

Abstract

Gaseousdetonationpropagationof2H2/O2/Armixtureinanannulartubewasexperimentallyandnumericallyinvestigated. Detonationcellularpatternswererecordedbysmokedfoils.The second-orderadditivesemi-implicitRunge-Kutta(ASIRK)methodandthefifth-orderweightedessentiallynon- oscillatory(WENO)schemewereusedtodiscretizethetimetermandthespatialderivatives, respectively.Adetailedchemicalreactionmechanism modelwasappliedtodescribetheprocessesofdetonationchemicalreactions. Numericalcellularpatternsanddetonationflowfieldwereobtained. Experimentalandnumericalresultsshowthatwhiledetonationpropagatesintheannular tube,duetotheconvergenceoftheouterwallandthedivergenceoftheinnerwall,thedetonationintensityalongtheinnerwallislowerthanthatalongtheouterwall, andthecellsizeismuchlarger. ThedistributionregionofOHalongtheinnerwallisalsowiderthanthatalongtheouterwall,and theconcentrationissmaller.Justbecauseofthecharacterofarotatingdetonation,thedetonation wavescanrotatearoundanaxisatasteadyangularvelocity.
- mechanicsofexplosion,
- rotatingdetonation,
- second-orderASIRK method,
- cellularpattern,
- self-sustainingmechanism

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