Reaction zone structure in supracompressed detonating explosives
Nanosecond time resolved particle velocity histories of supracompressed detonation waves in TNT-, TATB-, and HMX-based explosives are measured using a VISAR laser velocimeter and calculated using the ignition and growth reactive flow hydrodynamic computer code model. The Zeldovich-von Neumann-Doering (ZND) detonation wave structure is observed at pressures more than twice the self-sustaining detonation wave pressure. TNT and TATB exhibited a fast reaction which liberates approximately 80% of the total available exothermicity within 50 ns, followed by a slower reaction which lasts another 100--200 ns. These reaction rates are not strongly dependent on the initial shock pressure. The slower reaction is attributed to diffusion controlled solid carbon coagulation. The ignition and growth model using a ZND type model with a fast reaction preceding a slower reaction to the fully reacted product state accurately calculates the VISAR experimental data for TNT, LX-17, PBX 9404 and RX-26-AF. 21 refs., 15 figs., 3 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOD
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5651438
- Report Number(s):
- UCRL-101862; CONF-890811--34; ON: DE90000832
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
CARBON
CHEMICAL EXPLOSIVES
CHEMICAL REACTION KINETICS
COMPRESSION
COMPUTER CODES
DETONATIONS
ELEMENTS
EQUATIONS
EQUATIONS OF STATE
EXPLOSIVES
FLUID MECHANICS
HYDRODYNAMICS
KINETICS
MECHANICS
NITRO COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
REACTION KINETICS
TATB
TNT