Simulation of the ignition of organic explosives by a laser pulse in the weak absorption region

Numerical simulation of the ignition of RDX, HMX, and TATB by a nanosecond laser pulse was performed. The heat-conduction equation was solved in cylindrical coordinates with allowance for the multiple reflection of the light beam, a zero-order exothermic reaction, and melting. Despite the small temp...

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Bibliographic Details
Published inCombustion, explosion, and shock waves Vol. 53; no. 2; pp. 211 - 218
Main Authors Dolgachev, V. A., Duginov, E. V., Khaneft, A. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.03.2017
Springer Nature B.V
Subjects
Absorptivity
Classical and Continuum Physics
Classical Mechanics
Computer simulation
Conduction heating
Control
Cylindrical coordinates
Dynamical Systems
Energetic materials
Engineering
Exothermic reactions
Flux density
HMX
Ignition
Lasers
Light reflection
PETN
Physical Chemistry
Physics
Physics and Astronomy
Radiation absorption
RDX
TATB
Temperature gradients
Vibration
laser pulse
HMX
simulation
RDX
melting
PETN
ignition criterion
TATB
thermal initiation
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Summary:Numerical simulation of the ignition of RDX, HMX, and TATB by a nanosecond laser pulse was performed. The heat-conduction equation was solved in cylindrical coordinates with allowance for the multiple reflection of the light beam, a zero-order exothermic reaction, and melting. Despite the small temperature gradient due to the smallness of the radiation absorption coefficient, violation of thermal equilibrium due to Arrhenius nonlinearity leads to ignition of energetic materials from the surface. The critical energy density for ignition of PETN, RDX, HMX, and TATB by a nanosecond laser pulse was determined. Calculations have shown that with identical absorption and reflection coefficients, PETN is the most sensitive and TATB is the most heat-resistant.
ISSN:0010-5082
1573-8345
DOI:10.1134/S0010508217020125