Accession Number : ADP004346

Title :   A Thermal-Mechanical Model of Deflagration-to-Detonation in Granular Energetic Materials,

Corporate Author : SANDIA NATIONAL LABS ALBUQUERQUE NM

Personal Author(s) : Baer,M. R. ; Nunziato,J. W. ; Gross,R. J.

Report Date : JUN 1984

Pagination or Media Count : 9

Abstract : In this work we present a multiphase, reactive flow model, based on the theory of mixtures and utilize it to describe deflagration-to-detonation transition in granular explosives and propellants. This nonequilibrium model treats each phase as fully compressible and incorporates a dynamic compaction model for the granular reactant. Formulation of the constitutive models include a pressure-dependent burn rate and experimentally-determined porous bed permeability. Numerical solutions of the one-dimensional Eulerian equations are obtained using an implicit method-of-lines solver. The model has examined two exlosives: CP and HMX. Predictions with this model agree with existing experimental observations and demostrate that a thermodynamically-consistent multiphase model can describe the flame-spread processes of convective burning and detonation.

Descriptors :   *Model theory, *Explosives, *Propellants, *Deflagration, *Detonations, Propellant grains, Energetic properties, Granules, Compacting, Burning rate, Porous materials, Beds(Process engineering), Permeability, Numerical methods and procedures, Thermodynamics, Flame propagation, Mathematical models, HMX, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE