Open AccessLaser induced spark ignition of coaxial methane/oxygen/nitrogen diffusion flames
Author(s) -
Xiaohui Li,
Yang Yu,
Xin Yu,
Chang Liu,
Rongwei Fan,
Deying Chen
Publication year - 2014
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.22.003447
Subject(s) - ignition system , laser ignition , coaxial , materials science , minimum ignition energy , methane , oxygen , diffusion , laser , optics , nitrogen , analytical chemistry (journal) , thermodynamics , chemistry , physics , organic chemistry , chromatography , electrical engineering , engineering
We report the laser induced spark ignition (LSI) of coaxial methane/oxygen/nitrogen diffusion flames using the 1064 nm output of a Q-switched Nd:YAG laser. The minimum ignition energy (MIE) and ignition time of the LSI has been determined by measuring the emission signals due to the ignited flames. The effects of the gas mixture properties, including the overall equivalence ratio (Ф), oxygen concentration and flow rate, and the ignition positions on the two parameters have been investigated systematically. The variation of the MIE and ignition time with the experimental conditions has been compared with the existing results and discussed with a special concentration on the effects of the local Ф.