University of Illinois Urbana-Champaign

Deflagration-to-detonation transition in porous energetic materials comparative model study

Xu, Shaojie; Stewart, D. Scott

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https://hdl.handle.net/2142/112522

Description

Title
Deflagration-to-detonation transition in porous energetic materials comparative model study
Author(s)
  • Xu, Shaojie
  • Stewart, D. Scott
Issue Date
1996-04
Keyword(s)
  • Deflagration-to-detonation Transition
  • Porous Energetic Materials
Abstract
A numerical study of deflagration-to-detonation transition (DDT) in porous HMX materials is carried out. Three reactive flow models varying from single phase to three phase formulations are chosen for the study. The GISPA model is a single-phase model and the BKS model is a simplified two-phase, gas and solid model. The SVG model is a three-phase model which is based on evolution of solid, gas and void. The modeling assumptions made in construction of the SVG model are presented with a brief description of the other two models. In addition to hydrodynamic modeling, a new reaction-kinetics model, or rate law, is presented to model energy release. The rate law accounts for autocatalytic decomposition of HMX and the pressure dependent shock-todetonation transition kinetics. The model results are compared in detail against the DDT events observed in physical experiments. Numerical simulation of inert compaction waves and DDT is carried out for parameters suitable for powdered HMX. The simulation shows that all three models can effectively predict: (a) the formation of secondary compaction wave and a high density plug, (b) initiation of the transition to detonation in the front of the plug, and (c) survival of the plug residual after the detonation. The SVG model compares the best against the measurable data of the physical experiment and is also computationally efficient and well-posed. Therefore it is a good candidate for multi-dimensional DDT calculations.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 822
  • 1996-6009
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112522
Sponsor(s)/Grant Number(s)
Energy Department 96/04 LANL 6730 M 0014 3Z 96/04
Copyright and License Information
Copyright 1996 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.