Gustavsen, R. L.; Bartram, B. D.; Sanchez, N. J.
December 2009
AIP Conference Proceedings;12/28/2009, Vol. 1195 Issue 1, p253
Academic Journal
We present detonation wave profiles measured in two TATB based explosives and two HMX based explosives. Profiles were measured at the interface of the explosive and a Lithium-Fluoride (LiF) window using 1550 nm Photon Doppler Velocimetry (PDV). Planar detonations were produced by impacting the explosive with a projectile launched in a gas-gun. The impact state was changed from shot to shot in order to produce varied distances to detonation. In this way, we tuned the support of the Taylor wave following the Chapman-Jouget (CJ) or sonic state. Profiles from experiments with different support should be the same between the Von-Neumann (VN) spike and CJ state and different thereafter. Comparison of profiles with differing support, therefore, allows us to estimate reaction zone lengths. For the TATB based explosive, a reaction zone length of ≈3.9 mm, 500 ns was measured in EDC-35, and a reaction zone length of ≈6.3 mm, 800 ns was measured in PBX 9502 pre-cooled to -55° C. The respective VN spike state was 2.25±0.05 km/s in EDC-35 and 2.4±0.1 km/s in the cooled PBX 9502. We do not believe we have resolved either the VN spike state (>2.6 km/s) nor the reaction zone length (<50 ns) in the HMX based explosives.


Related Articles

  • Macrokinetics of the energy release in high explosives containing nano-size boron particles. Utkin, A. V.; Kanel, G. I.; Bogach, A. A.; Razorenov, S. V. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p869 

    The pressure and particle velocity histories in shock and detonation waves have been measured for a coarse-grain and a fine-grain HMX and for a fine-grain HMX+16.4% B mixture. It was concluded the initial decomposition rate and C-J parameters in the mixture are controlled by the heat exchange....

  • Mechanism of Detonation Wave propagation in PBX with Energetic Binder. Plaksin, I.; Campos, J.; Mendes, R.; Ribeiro, J.; Gois, J. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p817 

    The complex phenomena of Detonation Wave (DW) propagation in PBX of 82 % of HMX, with successively HTPB, as inert binder, and GAP as Energetic Binder (EB), with an initial density 99.5% TMD was studied. A thin optical multifibre strip (250 µm each fibre), connected to a fast electronic streak...

  • Reduction of the deflagration-to-detonation transition distance and time in a tube with regular shaped obstacles. Frolov, S. M.; Semenov, I. V.; Komissarov, P. V.; Utkin, P. S.; Markov, V. V. // Doklady Physical Chemistry;Aug2007, Vol. 415 Issue 2, p209 

    The article discusses the role of regular shaped obstacles in speeding up deflagration-to-detonation transition (DDT). It stresses the potential of regular obstacles of special shape to reduce the DDT length and time compared with the efficacy of regular rectangular obstacles. The authors note...

  • Estimation of the Shock to Detonation Region Inside an Energetic Material. Wemlinger, Erik; Stowe, David; Treadway, Sean; Czech, Christopher; Cogar, John // AIP Conference Proceedings;2017, Vol. 1793 Issue 1, p1 

    A series of six tests were conducted investigating the shock-to-detonation transition (SDT) in cylindrical samples of HE with a wax binder. A 40 mm powder gun was used to launch spherical steel fragments at a mean velocity of 1519 m/s into the HE. For each test 9 piezoelectric pins were placed...

  • Shock initiation of the TATB-based explosive PBX-9502 heated to ~76°C. Gustavsen, R. L.; Gehr, R. J.; Bucholtz, S. M.; Pacheco, A. H.; Bartram, B. D. // AIP Conference Proceedings;2017, Vol. 1793 Issue 1, p1 

    We present gas-gun driven plate impact shock initiation experiments on the explosive PBX 9502 (95 weight percent triaminotrinitrobenzene, 5 weight percent Kel-F 800 binder) heated to ∼ 76°C. PBX 9502 samples were heated by flowing hot air through a sample mounting plate and surrounding...

  • Effect of Properties of the Source on the Action of Explosions in Air and Water. Khristoforov, D. // Combustion, Explosion, & Shock Waves;Nov/Dec2004, Vol. 40 Issue 6, p714 

    Results of an experimental study of parameters of the shock wave and explosion products in the near zone of explosions in air and water with a wide range of variation of explosion heat and charge density of high explosives are presented. It is shown that the influence of these characteristics on...

  • Determination of chemical reaction zone parameters, neumann peak parameters, and the state in the Chapman-Jouguet plane in homogeneous and heterogeneous high explosives. Fedorov, A.; Mikhailov, A.; Antonyuk, L.; Nazarov, D.; Finyushin, S. // Combustion, Explosion, & Shock Waves;May2012, Vol. 48 Issue 3, p302 

    Parameters of detonation waves in homogeneous and heterogeneous high explosives are registered. Dependences of the duration of the chemical reaction zone on the critical diameter are obtained. The transition from a stable to an unstable detonation mode in liquid explosives is studied. In these...

  • Heat of explosion of commercial and brisant high explosives. Pepekin, V.; Gubin, S. // Combustion, Explosion, & Shock Waves;Mar2007, Vol. 43 Issue 2, p212 

    Methods for determining the heat of explosion of high explosives (HEs) with ideal and nonideal processes of explosive decomposition are considered. It is shown that the heat of explosion is of significance for estimating the efficiency of commercial HEs and is used in the energetic...

  • Destructive effect of accidental explosions of some mixed compositions. Mochalov, S. V.; Udovichenko, V. P.; Petrov, E. A. // Combustion, Explosion, & Shock Waves;Mar2006, Vol. 42 Issue 2, p217 

    This paper deals with issues related to the dependence of the parameters of an air blast wave on the mass of the explosive charge and explosion conditions. It is established that the explosive yield of mixed explosives changes appreciably with variation in the mass of the charge up to the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics