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Type: Artigo de periódico
Title: Experimental study of OH*, CHO*, CH*, and C-2* radicals in C2H2/O-2 and C2H2/O-2/Ar flames in a closed chamber
Author: Marques, CST
Benvenutti, LH
Bertran, CA
Abstract: An experimental study of OH*, CHO*, CH* and C-2* radicals in excited electronic states present in C2H2/O-2 and C2H2/O-2/Ar flames was carry out. Measurements of natural emissions of these species as a function of time were obtained for several combustion processes in a closed chamber. The emission times of all radicals for both C2H2/O-2 and C2H2/O-2/Ar flames were found to decrease with the increase of Phi from 0.30 to 0.68 and were almost the same Phi = 0.68, Phi = 1.00 and Phi = 1.62. CH*, The C-2* production efficiencies were almost constant in the range to Phi > 0.30, while the production efficiencies of OH* and CHO* radicals were reduced as Phi increased. The addition of argon to increase the total initial pressure had practically no effect on the chemiluminescence of radicals, except for the fuel-lean combustion (Phi = 0.30), in which the production efficiencies of excited radicals was reduced.
Subject: acetylene
excited radicals
closed chamber
Country: Inglaterra
Editor: Taylor & Francis Ltd
Citation: Combustion Science And Technology. Taylor & Francis Ltd, v. 167, n. 113, n. 129, 2001.
Rights: fechado
Identifier DOI: 10.1080/00102200108952179
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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