Session V6: Explosives Thermal/Mechanical Response
10:30 AM–12:15 PM, Friday, June 29, 2007
Fairmont Orchid Hotel Room: Promenade I/II
Chair: Laura Smilowitz, Sandia National Laboratories
Abstract ID: BAPS.2007.SHOCK.V6.5
Abstract: V6.00005 : Burn Propagation in a PBX 9501 Thermal Explosion
11:45 AM–12:00 PM
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Abstract 
Authors:
Bryan Henson
(Chemistry Division, LANL)
Laura Smilowitz
(Chemistry Division, LANL)
Jerry Romero
(Chemistry Division, LANL)
Blaine Asay
(DE Division, LANL)
Mary Sandstrom
(DE Division, LANL)
We have measured burn velocities in a series of radially heated PBX 9501 thermal explosion experiments. Burn fronts have been imaged in these experiments using proton radiography. The velocities observed imply a convective burn front moving at approximately 200m/s. A compendium of burn velocities verses pressure show two distinct burn mechanisms: convection and conduction. The 200m/s velocity places the PBX 9501 radial thermal explosion experiment in the convective regime with an implied pressure on the order of 1 Gpa. The density evolution observed shows that HE continues to be consumed behind the convective front. The HE consumption follows the approximate radial symmetry of the heating profile. A hypothesis for the material consumption is made based on the implied pressures and material state. Implications for incorporating PBX 9501 thermal ignition and burn into larger scale models are discussed.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.SHOCK.V6.5