A multiphase model for compaction-induced combustion of ball propellants
In this work, compaction-induced combustion in packed beds of nitrocellulose-based ball propellants is modeled using a multiphase mixture description. This model is applied to conditions simulating low-velocity impact experiments of Sandusky, et. al. (NSWC). A two- stage combustion model is used whereby compressive reaction begins at the compaction front. Subsequent energy release is delayed following an induction rate law based on time-to-reaction experimental data. Given conditions of sufficient energy release and heat transfer, grain burning is initiated when granular surface temperatures exceed decomposition conditions. Numerical solutions of the one-dimensional multiphase conservation equations are obtained using an adaptive finite element method and calculations are compared to experiments investigating various impact loading conditions on the ball propellants TS3659 and WC140. 11 refs., 12 figs., 1 tab.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6389687
- Report Number(s):
- SAND-89-0270C; CONF-890260-1; ON: DE89006999
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
450100 -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
99 GENERAL AND MISCELLANEOUS
990230* -- Mathematics & Mathematical Models-- (1987-1989)
CHEMICAL EXPLOSIVES
CHEMICAL REACTIONS
COMBUSTION
COMPRESSION
DECOMPOSITION
ENERGY TRANSFER
EQUATIONS
EQUATIONS OF STATE
EXPLOSIVES
FLUID MECHANICS
HEAT TRANSFER
HYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
OXIDATION
POROSITY
THERMOCHEMICAL PROCESSES