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Ignition of pyrotechnic mixture by means of a laser diode. Part I: Numerical modelling
Author(s) -
Gillard Ph.,
Roux M.
Publication year - 1997
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19970220503
Subject(s) - ignition system , laser , materials science , explosive material , thermal diffusivity , optics , diode , attenuation coefficient , laser ignition , laser diode , ultrafast laser spectroscopy , mechanics , absorption (acoustics) , computer simulation , transient (computer programming) , thermodynamics , optoelectronics , physics , chemistry , computer science , organic chemistry , operating system
A numerical model of the heating and ignition of a reactive solid by a laser beam has been developed. A transient, two‐dimensional heat equation was solved numerically using an explicit scheme. A nonlinear source term (Arrhenius equation) complicates the analytical resolution of this type of problem. Laser beam absorption is considered in a few micrometer depth. Influence of depth absorption coefficient is investigated. Influence of laser power density, lasering time and thermal diffusivity on ignition are examined by this model. The developed numerical model has been used to design a laser ignition system for explosive substances. It has been shown that ignition by a 0.6 W laser diode at a fiber optics output is feasible.