Modeling 1-D deflagration to detonation transition (DDT) in porous explosive

Conference · Thu Apr 04 00:00:00 EST 1985

OSTI ID:6707590

Weston, A M; Lee, E L

A one-dimensional Lagrange hydrodynamic computer model is presented that describes gas flow, compaction, ignition, and deflagration processes in deformable porous beds. The model makes use of a consumable finite element cell that allows gas to flow through a compacting matrix. The model can be regarded as structural in the sense that the initial cell dimension is directly related to mean particle size. Experimental investigation of the DDT phenomenon are typically carried out using long thick-walled tubes filled with a granular porous bed of reactive material. In this configuration, much of the process can be described by flow in one dimension. We present calculations that simulate both squib initiated and piston initiated experiments on porous HMX to point out various observed features. Our purpose is to establish a basis for setting bounds on the physical parameters that describe such transient reaction processes. 16 refs., 17 figs., 1 tab.

• Research Organization: Brobeck, Inc., Berkeley, CA (USA); Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6707590
• Report Number(s): UCRL-91483; CONF-850706-34; ON: DE87007100
• Resource Relation: Conference: 8. international symposium on detonation, Albuquerque, NM, USA, 15 Jul 1985; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
CHEMICAL EXPLOSIVES
DETONATIONS
COMBUSTION
COMPACTING
COMPUTERIZED SIMULATION
FINITE ELEMENT METHOD
GAS FLOW
IGNITION
MATHEMATICAL MODELS
ONE-DIMENSIONAL CALCULATIONS
POROUS MATERIALS
CHEMICAL REACTIONS
EXPLOSIVES
FLUID FLOW
MATERIALS
NUMERICAL SOLUTION
OXIDATION
SIMULATION
THERMOCHEMICAL PROCESSES
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives