- Author
-
Strakovskiy, L.
|
Cohen, A.
|
Fifer, R.
|
Beyer, R.
|
Forch, B.
- Title
- Laser Ignition of Propellants and Explosives.
- Coporate
- Army Research Laboratory, Aberdeen Proving Ground, MD
- Sponsor
- Army Research Office, Washington, DC
- Report
-
ARL-TR-1699
June 1998
73 p.
- Contract
- DAAL03-91-C-0034
- Keywords
-
propellants
|
explosions
|
lasers
|
ignition
|
solid propellants
|
ignition delay
|
thermophysical properties
|
high temperature
|
kinetics
|
thermal decomposition
|
vaporization
|
experiments
- Identifiers
- optical characteristics of explosives and propellants; converting ignition delays to the cases of surface energy absorption and radiation at different wavelengths; principal experimental results; experimental determination of high-temperature kinetic parameters for thermal decomposition and vaporization of explosives; summary of laser ignition thresholds and kinetic parameters derived from experiments
- Abstract
- Laser and radiative ignition of 24 solid propellants and explosives was analyzed. The effect of ignition criterion used to calculate ignition delays from models was evaluated. Values for the optical parameters reflection, R lambda and absorption, k lambda coefficients at wavelengths 0.36-1, 1.06 and 10.6 mum were summarized. Effects of in-depth absorption and vaporization were considered. Methods for determining the relation of ignition delays for conductive heating and radiative heating at various wavelengths are presented. Methods for deriving kinetic parameters for the ignition and vaporization mechanisms for RDX-based materials were developed. Changes in the ignition mechanism at high radiative flux levels are discussed. A summary of the minimum flux levels needed for ignition and the Arrhenius kinetic parameters determined from ignition delay measurements with several energetic materials is presented.