Understanding composite explosive energetics: 3, Reactive flow modeling of aluminum reaction kinetics in PETN and TNT
Using Fabry-Perot interferometry techniques, we have determined that early time rate of energy release from detonating PETN and TNT explosives filled with 5 and 10 wt % of either 5 {mu}m of 18 {mu}m spherical aluminum (Al) particles. From the measured particle velocity data, we are able to infer the reaction rate of aluminum with the detonation products, and calculate the extent of reaction 1--3 {mu}s after the detonation. We observed that a substantional portion of the aluminum metal in all of the PETN and TNE formulations reacted within the timeframe of the one-dimensional experiment. In the PETN formulation filed with 5 wt % of 5 {mu}m aluminum, all of the metal reacted within 1.5 {mu}s, resulting in an increase of 22% in energy compared to pure PETN. A reactive-flow hydrodynamic model based on the Zeldovich-von Neumann-Doring (ZND) description of the reaction zone and subsequent reaction produce expansion (Taylor wave) is used to interpret the reaction rate of the aluminum particles with detonation product gases. The diffusion-controlled reaction mechanism for aluminum and the global kinetic parameters used in the model have been found to be consistent for all the PETN and TNT formulations.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE; USDOD; USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5814921
- Report Number(s):
- UCRL-JC-108149; CONF-9110164-2; ON: DE92007297
- Resource Relation:
- Conference: 2. Beijing international symposium on pyrotechnics, Beijing (China), 28-31 Oct 1991
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM
CHEMICAL REACTION KINETICS
PETN
TNT
CHEMICAL EXPLOSIVES
DETONATIONS
EQUATIONS OF STATE
FABRY-PEROT INTERFEROMETER
POWDERS
ELEMENTS
EQUATIONS
ESTERS
EXPLOSIVES
INTERFEROMETERS
KINETICS
MEASURING INSTRUMENTS
METALS
NITRATES
NITRIC ACID ESTERS
NITRO COMPOUNDS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives
400201 - Chemical & Physicochemical Properties