Experimental study of OH*, CHO*, CH*, and C2* radicals in C2H2/O2 and C2H2/O2/Ar flames in a closed chamber

被引：8
|
作者：
Marques, CST [1 ]
Benvenutti, LH [1 ]
Bertran, CA [1 ]
机构：
[1] UNICAMP, Inst Quim, BR-13083970 Campinas, SP, Brazil
来源：
COMBUSTION SCIENCE AND TECHNOLOGY | 2001年 / 167卷 / 01期
关键词：
acetylene; combustion; excited radicals; closed chamber;
D O I：
10.1080/00102200108952179
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：113 / 129
页数：17
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