Study on the Mechanism of the Deflagration to Detonation Transition Process of Explosive

We present a numerical study of the mechanisms of the deflagration to detonation transition (DDT) process of explosives to assess its thermal stability. We treated the modeling system as a mixture of solid explosives and gaseous reaction products. We utilized a one-dimensional two-phase flow modelin...

Full description

Saved in:
Bibliographic Details
Published in:Journal of energetic materials 2014-10, Vol.32 (4), p.238-251
Main Authors: Wei, Lan, Dong, Hefei, Pan, Hao, Hu, Xiaomian, Zhu, Jianshi
Format: Article
Language:English
Subjects:
CE/SE method
Chemical reactions
DDT
Deflagration
deflagration to detonation transition
Density
Detonation
Energetic materials
explosive
Explosives
High temperature
Mathematical models
Numerical analysis
Simulation
two phase flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a numerical study of the mechanisms of the deflagration to detonation transition (DDT) process of explosives to assess its thermal stability. We treated the modeling system as a mixture of solid explosives and gaseous reaction products. We utilized a one-dimensional two-phase flow modeling approach with a space-time conservation element and solution element (CE/SE) method. Simulation results show that in the chemical reaction process a plug area of high density with relatively slow chemical reactions preceeds the new violent reactions and the consequent detonation. We found that steady detonation occurs at the regions where physical characteristics, such as pressure, density, temperature, and velocity, peak simultaneously. These simulation results agree well with high-temperature DDT tube experiments.
ISSN:0737-0652
1545-8822
DOI:10.1080/07370652.2013.825347