Journal
COMBUSTION AND FLAME
Volume 140, Issue 1-2, Pages 34-45Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2004.10.002
Keywords
premixed flame; laminar flame; chemiluminescence; combustion diagnostics
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Detailed spatial intensity profiles of OH(A), CH(A), and C-2(d) chemiluminescence in the reaction zone were revealed in two-dimensional laminar premixed flames (phi = 0.85-1.5) using spatially resolved emission measurements with a resolution-enhanced Cassegrain-type optical probe. A numerical simulation of one-dimensional laminar premixed flames using the PREMIX code, with GRI-Mech 3.0 incorporating with reaction and quenching kinetics for OH(A), CH(A), and C-2(d), was compared with the experimental result. The measured and simulated profiles showed reasonable agreement in shape, peak location, emission zone thickness, and peak-intensity variation in fuel-lean and stoichiometric flames. We found disagreement between the experimental and numerical results under fuel-rich conditions, which likely resulted from incomplete C-2(d) chemistry used in the present study. Stoichiometry dependence of chemiluminescence peak-intensity ratio, OH(A)/CH(A), observed experimentally was clearly supported by the simulated result. (C) 2004 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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