Microconvective heating of granular explosives by a semiconductor bridge
The ignition of reactive powders by a semiconductor bridge (SCB) is analyzed by applying a multiphase flow model based upon the theory of mixtures. The hot plasma produced by the SCB permeates the cold granular explosive, deposits its latent heat upon fusing to the grains, therby heating the explosive granular surfaces to energy states required for self-sustained reaction. This mechanism is predicted to heat the granular explosive in a region local to the SCB to temperatures well above those required for thermal ignition. The analysis demonstates that this mechanism explains the prompt ignition of explosives using SCB's as opposed to the conductively controlled heating of conventional bridgewires. 16 refs., 14 figs., 1 tab.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- DOE/MA
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5106181
- Report Number(s):
- SAND-89-2033; ON: DE90005710
- Country of Publication:
- United States
- Language:
- English
Similar Records
Smart semiconductor bridge (SCB) igniter for explosives
Characterization and electrical modeling of semiconductors bridges
Related Subjects
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CHEMICAL ANALYSIS
CHEMICAL EXPLOSIVES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
CONVECTION
DATA
DEMONSTRATION PROGRAMS
DOPED MATERIALS
DYNAMICS
EFFICIENCY
ELECTRIC BRIDGES
ELECTRICAL EQUIPMENT
ENERGY EFFICIENCY
ENERGY TRANSFER
EQUIPMENT
EXPERIMENTAL DATA
EXPLOSIVES
FLUIDS
GASES
HEAT TRANSFER
IGNITION
INFORMATION
KINETICS
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL DATA
PERFORMANCE TESTING
PYROTECHNIC DEVICES
REACTION KINETICS
RELIABILITY
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SILICON DIODES
STABILITY
TECHNOLOGY ASSESSMENT
TEMPERATURE EFFECTS
TESTING
VAPORS
VARIATIONS