Jet initiation and penetration of explosives
The two-dimensional Eulerian hydrodynamic code 2DE, with the shock initiation of heterogeneous explosive burn model called Forest Fire, is used to model numerically the interaction of jets of steel, copper, tantalum, aluminum, and water with steel, water, and explosive targets. The calculated and experimental critical condition for propagating detonation may be described by the Held V/sup 2/d expression (jet velocity squared times the jet diameter). In PBX 9502, jets initiate an overdriven detonation smaller than the critical diameter, which either fails or enlarges to greater than the critical diameter while the overdriven detonation decays to the C-J state. In PBX 9404, the jet initiates a detonation that propagates only if it is maintained by the jet for an interval sufficient to establish a stable curved detonation front. The calculated penetration velocities into explosives, initiated by a low-velocity jet, are significantly less than for non-reactive solids of the same density. The detonation products near the jet tip have a pressure higher than that of nonreactive explosives, and thus show the jet penetration. At high jet velocities, the calculated penetration velocities are similar for reactive and inert targets.
- Research Organization:
- Los Alamos National Lab., NM
- OSTI ID:
- 6804522
- Journal Information:
- Journal of Energetic Materials; (United States), Journal Name: Journal of Energetic Materials; (United States) Vol. 1003-1044
- Country of Publication:
- United States
- Language:
- English
Similar Records
Jet initiation of explosives. [PBX 9502 and PBX 9404]
Jet penetration of inerts and explosives. [2DE computer code]
Related Subjects
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
ALLOYS
ALUMINIUM
COPPER
DETONATIONS
ELEMENTS
EXPLOSIVES
FLUID MECHANICS
HYDRODYNAMICS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
JETS
MECHANICS
METALS
OXYGEN COMPOUNDS
SHOCK WAVES
STEELS
TANTALUM
TRANSITION ELEMENTS
VELOCITY
WATER
WAVE PROPAGATION