Abstract
A mechanism of detonation of emulsion explosives containing microballoons in finite-diameter charges is described. A parametric dependence of the detonation velocity on the charge characteristics is obtained. The fact that the reaction-zone width increases with decreasing charge porosity is explained. It is shown that the emulsion does not completely burn out at the Chapman-Jouguet point. Final formulas for calculating the reaction time and reaction-zone width are given.
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Abbreviations
- HE:
-
High explosive
- EMX:
-
Emulsion explosive
- CJ:
-
Chapman-Jouguet point
References
Anshits A.G., Anshits N.N. et al.: Detonation velocity of emulsion explosives containing cenospheres. Combust. Explosi. Shock Waves 41, 591–598 (2005)
Chaundri M., Field J.E.: The role of rapidly compressed gas pockets in the initiation of condensed explosives. Roy. Soci. Lond. Proceed. Ser. A 340, 113–128 (1974)
Chick, M.C.: The effect of interstital gas on the shock sensitivity of low density explosive compacts. In: Proceedings of the 4th Symposium (International) on Detonation, U.S. Naval Ordnance Laboratory, Maryland, pp. 349–358 (1965)
Deribas A.A., Medvedev A.E., Reshetnyak A.Yu., Fomin V.M.: Detonation of emulsion explosives containing hollow microspheres. Dokl. Phys. 389, 163–165 (2003)
Deribas, A.A., Medvedev, A.E., Fomin, V.M., Reshetnyak, A.Yu., Shabalin, I.I.: Mechanism of detonation of emulsion explosives with hollow microballoons. In: XII International Conference on the Methods of Aerophysical Research, Novosibirsk, Russia, 28 June–3 July, 2004, Part I, pp. 75–80 (2004)
Dremin, A.N., Klimenko, V.Yu., Kosireva, I.Yu.: On the mechanism of the reaction “hot spots” origin at liquid explosives detonation. In: Proceedings of the 9th Symposium (International) on Detonation, Albuquerque, New Mexico, pp. 678–687 (1985)
Eyring H., Powell R.E. et al.: The stability of detonation. Chem. Rev. 13, 69–181 (1949)
Gol’dshtik, M.A.: Transfer Processes in a Grainy Layer. Institute of Thermophysics SB RAS, Novosibirsk (1984)
Holian B.L., Germann T.C., Maillet J.-B., White C.T.: Atomistic mechanism for hot spot initiation. Phys. Rev. Lett. 89, 285501-1–285501-4 (2002)
Khasainov, B.A., Borisov, A.A., Ermolaev, B.S., Korotkov, A.I.: Viscoplastic mechanism of hot-spot initiation in solid heterogeneous explosives. In: Detonation, Proceedings of II All-Union Workshop on Detonation, Issue II, Chernogolovka, 19–22 (1981)
Khasainov B.A., Ermolaev B.S., Presles H.N.: On the effect of grain size on shock sensitivity of heterogeneous high explosives. Shock Waves 7, 89–105 (1997)
Kondrikov B.N., Annikov V.E., Kozak G.D.: A generalized dependence of the critical detonation diameter of porous substances on the density. Combust. Explos. Shock Waves 33, 219–229 (1997)
Lee J., Persson P.A.: Detonation behavior of emulsion explosives. Propellants, Explos. Pyrotech. 15, 208–216 (1990)
Lee, J., Sandstrom, F.W., Craig, B.G., Persson, P.A.: Detonation and shock initiation properties of emulsion explosives. In: Proceedings of the 9th Symposium (International) on Detonation, Portland Oregon, pp. 263–271 (1989)
Mader Ch.L.: Numerical Modeling of Explosives and Propellant, 2nd edn. CRC Press LLS, New York (1998)
Mitrofanov, V.V.: Detonation Theory. Izd. Novosib. Gos. Univ., Novosibirsk (1982)
Nikolaevskii, V.N. (ed.): Underground and Underwater Explosions 416 pp. Mir, Moscow (1974)
Patrashev, A.N., et al.: Applied Hydromechanics. Voenizdat, Moscow (1970)
Sedov L.I.: Mechanics of Continuous Media, vol. 2. Lan’, Moscow (2004)
Sil’vestrov, V.V., Karakhanov, S.M., et al.: Effect of emulsion HE density on the reaction-zone width. In: Proceedings of the International Conference “VIIth Khariton Readings”, March 14–18, pp. 132–137. Inst. Exp. Phys. Sarov (2005)
Sil’vestrov V.V.: Dependence of detonation velocity on density for high explosives of the second group. Combust. Explosi. Shock Waves 42, 472–479 (2006)
Solovev, V.S., Attenkov, A.V., Babkin, A.V., Boiko, M.M., Kolpakov, V.I.: Estimate of the possibility of local heating by the plastic flow mechanism. In: Detonation, Proceedings of II All-Union Workshop on Detonation, Issue II, Chernogolovka, pp. 15–19 (1981)
Sosnin, V.A., Kolganov, E.V.: Investigation of the detonation process in commercial emulsion explosives. In: Substances, Materials, and Structures under Intense Dynamic Actions: Vth Khariton Readings, Sarov, pp. 265–274 (2003)
Zababakhin, E.I.: Some Issues of Explosion Gas Dynamics. Russian Federal Nuclear Center, Institute of Technical Physics, Snezhinsk (1997)
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Communicated by E. Timofeev.
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Medvedev, A.E., Fomin, V.M. & Reshetnyak, A.Y. Mechanism of detonation of emulsion explosives with microballoons. Shock Waves 18, 107–115 (2008). https://doi.org/10.1007/s00193-008-0141-2
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DOI: https://doi.org/10.1007/s00193-008-0141-2