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Detonation and Deflagration Properties of Pyrotechnic Mixtures

Published online by Cambridge University Press:  10 February 2011

Katsumi Tanaka
Katsumi Tanaka*
Affiliation:
National Institute of Materials and Chemical Research, Tsukuba Research Center, Tsukuba, Ibaraki 305, Japan, tanaka@nimc.go.jp
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Abstract

Theroretical calculation of detonation and deflagration properties of pyrotechnic mixtures have been performed including report charges and display charges. Calculation were performed with the KHT (Kihara-Hikta-Tanaka) code[l]. KHT results are compared with a modified version of the TIGER code[2] which allows calculation with 900 gaseous and 600 condensed product species at high pressure. Detonation properties computed by KHT and BKWS (Becker-Kistiakowskii-Wilson) give favorable agreement with experimental results of detonation velocity measurements. Hydrodynamic computation by one dimensional Lagrangian hydrodynamic code using the isentrope given by KHT constant volume explosion, indicated that experimental results for blast wave measurement for 30kg and 50kg of report charge were an incomplete reaction. Underwater detonation experiments with explosive charge of 25g, however, indicates a more energetic nature than the KHT prediction. This scale effect indicates complicated slow reactions and a number of condensed phase deflagration products of powder mixtures such as aluminum or titanium with oxidizers such as potassium perchlorate or nitrate salts as suggested by Hobbs et al[3].

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 418: Symposium GG – Decomposition, Combustion, and Detonation Chemistry of Energetic Materials , 1995 , 427
Copyright
Copyright © Materials Research Society 1996

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References

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