CriticalenergyfordirectinitiationofC2H4-O2 mixture

ZHANG Bo; Lee J H S; BAI Chun-hua

doi:10.11883/1001-1455(2012)02-0113-08

Volume 32 Issue 2

May 2014

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Article Navigation > Explosion And Shock Waves > 2012 > 32(2): 113-120

WANG Mingtao, CHENG Yuehua, WU Hao. Calculation model for the blast wave load by explosion of air-moving cylindrical charges[J]. Explosion And Shock Waves, 2024, 44(7): 074201. doi: 10.11883/bzycj-2023-0447

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ZHANG Bo, Lee J H S, BAI Chun-hua. CriticalenergyfordirectinitiationofC2H4-O2 mixture[J]. Explosion And Shock Waves, 2012, 32(2): 113-120. doi: 10.11883/1001-1455(2012)02-0113-08

Citation:

ZHANG Bo, Lee J H S, BAI Chun-hua. CriticalenergyfordirectinitiationofC2H4-O2 mixture[J]. Explosion And Shock Waves, 2012, 32(2): 113-120. doi: 10.11883/1001-1455(2012)02-0113-08

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CriticalenergyfordirectinitiationofC2H4-O2 mixture

doi: 10.11883/1001-1455(2012)02-0113-08

1.
StateKeyLaboratoryofExplosionScienceandTechnology,
2.
BeijingInstituteofTechnology,Beijing 100081,China;

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Corresponding author: ZHANG Bo
Publish Date: 2012-03-25

Abstract

Abstract

ThedetonationcellsizefortheC2H4-O2 mixturewaspredictedbychemicalkineticsand Ngsmodel.AndtogetherwithLeessurfaceenergymodel,thecriticalenergywasestimatedforthe directinitiationofsphericaldetonationintheC2H4-O2 mixtureunderdifferentinitialpressuresandat differentequivalenceratios.Thedirectinitiationwasperformedviaahighvoltagecapacitorsparkdischargeandthecriticalenergywasaccuratelydeterminedfromthecurrent utputanalysis.Goodagreementwasfoundbetweenthetheoreticalpredictionandtheexperimentalmeasurement. Through steadyZNDanalysesbasedonacomprehensivekineticmechanismandbyusingtheimprovedsemiempiricalcorrelationbyNg, thefactorintherelationbetweenthecellsizeanditsZNDinductionzone length,i.e.,non-dimensionalparameterA,wasdeterminedatdifferentinitialpressuresandequivalenceratiosasfollowing: A=43.815(1+p/p0)-0.12371andA=8.531exp(/3.135)+28.644,respectively. Thecellsizecanbecalculatedultimatelyfromthesecorrelations,andtheexperimentally measuredcellsizesagreewellwiththetheoreticalpredictiondata.Thecellsizeisconsideredasaninputintermediatecharacteristicparameterandusedtoestimatethecriticalenergyfordirectinitiation basedonLeessurfaceenergymodel.Thecombinationofchemicalkineticsandtheoreticalmodels mayformaquantitativetheorytopredictthecriticalenergyfordirectinitiation.Thetheoreticalcurve fitoftheparametricrelationshipbetweenthecriticalinitiationenergyandtheinitialpressureaswell astheequivalenceratioisEc=0.332(p/p0)-2.017andEc=exp[3.951(-1.401)2-1.9],respectively.
- mechanicsofexplosion,
- criticalinitiationenergy,
- directinitiation,
- C2H4-O2 mixturegas,
- cellsize,
- chemicalkinetics,
- sparkignition

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