Effectsofencroachmentanddesquamationofignitionjet

oncombustionpropertyofbasebleedpropellant

ZHANG Ling-ke; ZHOU Yan-huang; YU Yong-gang; LU Xin; LIU Dong-yao

doi:10.11883/1001-1455(2010)06-0658-06

Volume 30 Issue 6

May 2014

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Article Navigation > Explosion And Shock Waves > 2010 > 30(6): 658-663

SUN Yu-xin, FU Yan-shu, WANG Xiao-ping. Influences of coating materials on temperature of amorphous foils during explosive welding[J]. Explosion And Shock Waves, 2008, 28(4): 350-354. doi: 10.11883/1001-1455(2008)04-0350-05

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ZHANG Ling-ke, ZHOU Yan-huang, YU Yong-gang, LU Xin, LIU Dong-yao. Effectsofencroachmentanddesquamationofignitionjet oncombustionpropertyofbasebleedpropellant[J]. Explosion And Shock Waves, 2010, 30(6): 658-663. doi: 10.11883/1001-1455(2010)06-0658-06

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Effectsofencroachmentanddesquamationofignitionjet oncombustionpropertyofbasebleedpropellant

doi: 10.11883/1001-1455(2010)06-0658-06

1.
PowerEngineeringCollege,NanjingUniversityofScienceandTechnology,

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Corresponding author: ZHANG Ling-ke
Publish Date: 2010-11-25

Abstract

Abstract

Toinvestigatethecaseoffragmentsdroppingandcombustionpropertychangingofbase bleedpropellantgrainresultingfromtheeffectofencroachmentanddesquamationcausedbythejetof ignition,thesemi-closedbombwasusedtosimulatethestageofrapiddepressurizationafterbase bleedprojectileflightoutofthenozzle.Theserialimagesofignitionandcombustionofbasebleed propellantgrainwererecordedbymeansofhighspeedvideosystem.Themathematicmodelofcombustionofbasebleedpropellantinthesemi- closedbombwasbuilt.Thechangesofaveragepressure, massflowrateandcombustiontimefordifferentqualityoftotalfragmentswerecalculatedandanalyzed. Thestudyresultsareasfollows:Thephenomenonofencroachmentanddesquamationhappen atinitialstagesofignition;Thefragmentsaredesquamatedfromthepartofbasebleedpropellant grainnotbeingignited;Theeffectofencroachmentanddesquamationiscausedbytheencroachment andimpactofignitionjet;Themassofallfragmentsis(7-9)percentoftheinitialmassofthebase bleedpropellant;Theactionofencroachmentanddesquamationaffectsseriouslytheconsistenciesof ignitionofigniterandcombustionofbasebleedpropellantgrain.Thecalculationresultsagreewell withtheexperimentalresults.
- mechanicsofexplosion,
- ignitionjet,
- encroachmentanddesquamation,
- basebleedpropellantgrain

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