Open AccessVisualization of laser-induced breakdown and ignition
Author(s) -
Ying-Ling A. Chen,
James W. Lewis
Publication year - 2001
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.9.000360
Subject(s) - ignition system , nanosecond , planar laser induced fluorescence , materials science , laser , laser ignition , optics , plasma , laser induced breakdown spectroscopy , laser induced fluorescence , radiative transfer , cascade , physics , chemistry , chromatography , quantum mechanics , thermodynamics
Laser-induced gas breakdown and ignition of atmospheric pressure NH3/O2 mixtures are investigated. The nanosecond-pulsed, 1064-nm Nd:YAG laser is used to create the cascade-type optical breakdown. The post-breakdown plasma and ignition are studied using spectroscopic techniques that include spontaneous emission and NH planar laser-induced fluorescence (PLIF). These time-resolved two-dimensional images provide not only radiative and gas dynamic information but also the space-time loci of the temperature and transient species concentrations. The results provide an understanding of the plasma kernel dynamics and the flame development that is essential to verify on-going simulation modeling of laser-ignition.