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2 5 4                                                                   !"#,$%,&'(,)*+,,-.

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         NumericalSimulationoftheFactorsAffectingtheIgnitionThresholdofanExplodingFoilInitiator

         QIAN Shichuan,GAN Qiang,REN Zhiwei,CHENG Nianshou,FENG Changgen
         (StateKeyLaboratoryofExplosionScienceandTechnology,BeijingInstituteofTechnology,Beijing100081,China)

         Abstract:Tostudytheinfluenceofthetransducercomponentcomposedofbridgefoil,flyerandacceleratingchamberontheex
         plodingfoilinitiator(EFI)ignitionperformanceandachievethegoalofreducingtheignitionthreshold,ANSYS/AUTODYN soft
         warewasusedtosimulatetheprocessthatbridgefoildrivenflyertodetonateHNS Ⅳ.Theinfluenceofbridgefoilthicknessonfly
         erspeedwasstudied,andtheinfluencesofbridgeareawidth,flyermaterial(organicglass,ceramicandpolyimide),flyerthick
         nessandacceleratingchamberlengthonEFIignitionthresholdwereinvestigated.Resultsshow thatreducingthewidthofbridgear
         eaishelpfultoreducetheignitionthresholdofexplodingfoilinitiator.Underthesameinputvoltage,thespeedofflyerdrivenby
         bridgefoilwiththicknessof2μ m ismaximum.Theignitionvoltageofexplodingfoilinitiatordecreasesfirstlyandthenincreases
         withtheincreaseofflyerthickness,andtheignitionvoltageislowestwhenthethicknessis10μ m.Comparedwith0.225mm,
         0.250mm and0.275mm acceleratingchamber,ignitionvoltageof0.125mm oneislowest,soreducingtheaccelerationchamber
         lengthisbeneficialforreducingignitionthresholdofexplodingfoilinitiator.Undertheconditionofdeterminigtheaccelerating
         boreaperture,“infinite”acceleratingchamberisbetterthan“finite”acceleratingchamberforreducingfiringvoltageofEFI.Poly
         imidehasbettermechanicalproperties,lowerignitionvoltageandlowerkineticenergycomparedwithothertwomaterials(organ
         icglassandceramic).
         Keywords:militarychemistryandpyrotechnictechnology;explodingfoilinitiator;fluidsolidcoupling;numericalsimulation;ig
         nitionthreshold
         CLCnumber:TJ45                    Documentcode:A                DOI:10.11943/j.issn.10069941.2018.03.008










































         ChineseJournalofEnergeticMaterials,Vol.26,No.3,2018(248 - 254)  !"#$          www.energeticmaterials.org.cn
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