Page 153 - 《含能材料》火工品技术合集 2015~2019
P. 153
8 9 6 FANG Kuang,CHEN Qingchou,FU Qiubo,WANG Yao
-1
-1
suretransition,theflyerposewouldgetworseasbarrellength arerespectively4273m· s and3164m· s .Inaddition,
extends.Theflyermightinclineastheflightdistanceextended, asitexhibitedinFig.11b,inthefirst0.2mm,theflyerveloc
-1
#
#
-1
whichwouldcausealargercontactangleandsmallerinterfaceof itycouldreachto3791m·s (1),and2793m·s (2),
impact,andconsequentlyenlargetheinitiationenergybecauseof thevelocityofflyer25 μ m is36% higherthanthatofflyer
diametereffect.Inadditiontheablationofhotplasmawillin 40μ m,whileattheimpactpoint0.4mm,theincrementde
creasesynchronallyasbarrellengthincreasefrom 0.2 mm to creaseto30%.
0.4mm,whichwillleadstothecrippleofflyer′simpactdura Thephenomenarevealthatthethickerflyerlackstheabil
tion,andmeanwhileenlargetheinitiationenergy.Althoughthe ityoffastaccelerationandtherebyneedsalongerbarreltoob
flyervelocityat0.4mm ishigherthantheoneat0.2mm,the tainahighervelocityrelatively.Forthethinflyer,thevelocity
combinationoftheotheradversefactorsmayleadtotheincreas isabletoreachthemaximum inashortdistance.Whilecon
[9]
ingofmeanthresholdvoltage .Theinfluencingproportionof sideringtheablationofhotplasma,alongerbarreldoesn′t
thoseingredientsneedsmoreprofoundresearch. necessarilyguaranteebetterflyeracceleration.
4.4 InfluencesofFlyerThickness 4.5 TheFiringTestofHNS Ⅳ
Theeffectofflyerthicknessontheflyeraccelerationhas Forthedetonationcapabilityevaluation,theintegratedEFI
alsobeeninvestigatedbythePDVdiagnosticsystem.Thetest wasassembledwiththeHNS Ⅳ,asillustratedinFig.12.The
samplesweresetwithdifferentflyerthicknessbuttheotherpa firingconditionwaslistedinTable5.Thedimensionofthepel
-3
rametersareidenticalaslistedinTable4. letis Φ 4mm×4mm,thedensityis1.58g·cm .Thefunction
#
AsitillustratedinFig.11a,theflyerofsample1 acceler timewasdetectedbytheprobeattachedtotheexplosive.
#
atesmuchfasterthanthatof2,themaximum offlyervelocity
Table5 ThefiringconditionforthedetonationofHNS Ⅳ
Table4 ThesampleparametersofEFIflyerthicknesstest voltage barrel flyer functiontime
sample
foil barrel flyer /V material material / μ s
barrel flyer #
sample thickness length thickness 1 2700 Su8 ParyleneC 1.00
material material
/ μ m /mm / μ m 2 # 2700 Su8 ParyleneC 1.06
1 # 4 0.4 Su8 25 paryleneC 3 # 2100 Su8 ParyleneC -
2 # 4 0.4 Su8 40 paryleneC
Fig.12 FiringtestofintegratedEFI
a.timevelocityprofileofflyeracceleration
Aslistedintable5,theintegratedEFIcouldsuccessfully
detonatetheHNS Ⅳ withafiringvoltageabove2700V,the
functiontimeisaround1.00μ s,whichis0.1μ shigherthan
thatoftheconventionalEFIwithapolyimideflyer,thereason
forthisphenomenon,mightduetosubstratebondingforcedi
vergence caused by the different fabrication process of
paryleneCandpolyimideflyer,whiletheprofounderexplana
tionneedfurtherresearch.
5 Conclusions
b.timedisplacementprofileofflyeracceleration
Inthepresentwork,weproposedthefabricationprocessof
Fig.11 FlyervelocitydiagnosticofEFIassembledwithdifferentflyer
thickness anintegratedEFIwhichwaseffectiveforthedetonationofHNS
ChineseJournalofEnergeticMaterials,Vol.24,No.9,2016(892-897) !"#$ www.energeticmaterials.org.cn