Numericalinvestigationsondetonationinitiationaccelerated

bycollisionofdiffractedshockwaves

SUN Xiao-hui; CHEN Zhi-hua; ZHANG Huan-hao

doi:10.11883/1001-1455(2011)04-0407-06

Volume 31 Issue 4

May 2014

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Article Navigation > Explosion And Shock Waves > 2011 > 31(4): 407-412

LI Rui, LI Weibing, WANG Xiaoming, LI Wenbin. Effects of three-point initiation control parameters on formation of explosively-formed projectiles with fins[J]. Explosion And Shock Waves, 2018, 38(3): 501-508. doi: 10.11883/bzycj-2016-0272

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SUN Xiao-hui, CHEN Zhi-hua, ZHANG Huan-hao. Numericalinvestigationsondetonationinitiationaccelerated bycollisionofdiffractedshockwaves[J]. Explosion And Shock Waves, 2011, 31(4): 407-412. doi: 10.11883/1001-1455(2011)04-0407-06

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Numericalinvestigationsondetonationinitiationaccelerated bycollisionofdiffractedshockwaves

doi: 10.11883/1001-1455(2011)04-0407-06

1.
ScienceandTechnologyonTransientPhysicsLaboratory,NanjingUniversityof

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Corresponding author: CHEN Zhi-hua
Publish Date: 2011-07-25

Abstract

Abstract

Basedontheone-stepchemicalreactionEulerequations,thehighresolutionhybridRoe/ HLLschemeandtheadaptivemeshrefinement(AMR)methodwereemployedtonumericallyinvestigatetheprocessofdetonationinducedbythecollisionofthediffractedshockwavesinsideasquare tubewithacubemountedattheaxis.Andtheeffectsofthetubeblockageratioswerediscussedon thedetonationformation.Numericalresultsshowthatwhentheweakshockwavespassaroundthe squareobstruct,boththeupanddownweakshockwavediffractionsoccur,andtheycollidewitheach otherbehindtheobstructafteraperiodofexpansion,ahighpressureandtemperaturepointcanbe generatedduringthecollision,whichcanignitethecombustiblegasesandacceleratetheformationof detonation.However,withalargeblockageratio,astheshockwaveistooweakduringthecollision, thedetonationcannotbeinitiated.
- mechanicsofexplosion,
- collision,
- obstruct\shockwave\detonation,
- combustion

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