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Volume 32 Issue 4
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Article Navigation >  Explosion And Shock Waves  > 2012  >  32(4): 432-438
KUAI Nian-sheng, HUANG Wei-xing, YUAN Jing-jie, . Influenceofignitionenergyondustexplosionbehavior[J]. Explosion And Shock Waves, 2012, 32(4): 432-438. doi: 10.11883/1001-1455(2012)04-0432-07
Citation: KUAI Nian-sheng, HUANG Wei-xing, YUAN Jing-jie, . Influenceofignitionenergyondustexplosionbehavior[J]. Explosion And Shock Waves, 2012, 32(4): 432-438. doi: 10.11883/1001-1455(2012)04-0432-07
shu

Influenceofignitionenergyondustexplosionbehavior

doi: 10.11883/1001-1455(2012)04-0432-07
  • 1.

    SchoolofChemicalEngineering,SichuanUniversity,Chengdu610065,Sichuan,China

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  • Corresponding author: HUANG Wei-xing
  • Publish Date: 2012-07-25
    Abstract
  • Inordertopreventandcontrolindustrialdustexplosionandimprovetheaccuracyofdust explosiontests,anexperimentalresearchwascarriedouttohaveaninsightintotheexplosionbehaviorofhigh- andlow-volatiledustsinducedbydifferentignitionenergiesbyusingaSiwek20Lsphericalexplosiontestsystem. Ignitionenergyeffectondustexplosionbrisance(max.explosionpressure, max.pressurerisingrateandcombustionduration)andsensitivity (lowerexplosionlimit)andthe variationofexplosionsuppressioneffectivenessofinertsubstancealongwiththeignitionenergywere explored.Resultsshowthathigherignitionenergyimprovestheexplosionenergyreleaseandcombustionrateofdustcloud; theeffectofignitionenergyonexplosionbehaviorismoresignificantforless volatiledust.Incompletedeflagrationoflow-volatiledustundertheconditionoflowignitionenergy resultsintheadverseeffectofexplosion.Theadverseeffectofexplosionbecomesinconspicuousas thedustconcentrationincreases.Thelowerexplosionlimitdecreasessharplywiththeriseofignition energyforlow-volatiledust,whilethelowerexplosionlimitofhigh-volatiledustisnotsosensitiveto ignitionenergy.Moreover,explosionsuppressioneffectivenessofinertsubstancedecreaseswiththe riseofignitionenergy.Theignitionenergyof5~10kJisthemostappropriateforunderstandingthe lowerexplosionlimitoflow-volatiledustandtheexplosionsuppressioneffectivenessofinertsubstance. Theaboveresultsmaybevaluableforunderstandingthedustexplosioncharacteristicsand completingthecurrentdustexplosioncharacteristicstestandsafetydesign.
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