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Reaction Rate Modeling in the Deflagration to Detonation Transition of Granular Energetic Materials

Published online by Cambridge University Press:  10 February 2011

S. F. Son ,
B. W ASAY ,
J. B. Bdzil  and
E. M. Kober
S. F. Son
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
B. W ASAY
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
J. B. Bdzil
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
E. M. Kober
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

The problem of accidental initiation of detonation in granular material has been the initial focus of the Los Alamos explosives safety program. Preexisting models of deflagration-to-detonation transition (DDT) in granular explosives, especially the Baer & Nunziato (BN) model, have been examined. The main focus of this paper is the reaction rate model. Comparison with experiments are made using the BN rate model. Many features are replicated by the simulations. However, some qualitative features, such as inert plug formation in DDT tube-test experiments and other trends, are not produced in the simulations. By modifying the reaction rate model we show inert plug formation that more closely replicates the qualitative features of experimental observations. Additional improvements to the rate modeling are suggested.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 418: Symposium GG – Decomposition, Combustion, and Detonation Chemistry of Energetic Materials , 1995 , 313
Copyright
Copyright © Materials Research Society 1996

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