文献类型：期刊文献

英文题名：Experimental Study on OH*, CH*, and CO2*Chemiluminescence Diagnosis of CH4/O2 Diffusion Flame with CO2-Diluted Fuel

作者：Tian, Xinming[1];Yang, Jiabao[1];Gong, Yan[1];Guo, Qinghua[1];Wang, Xingjun[1];Yu, Guangsuo[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gree, Yinchuan 750021, Ningxia, Peoples R China

年份：2022

卷号：7

期号：45

起止页码：41137

外文期刊名：ACS OMEGA

收录：;EI(收录号：20220158814);WOS:【SCI-EXPANDED(收录号:WOS:000884475700001)】；

基金：? ACKNOWLEDGMENTS This work has been supported by the Project of Key Research Plan of Ningxia (2019BCH01001) and National Natural Science Foundation of China (U21A20318, 22178112) .

语种：英文

外文关键词：Carbon dioxide - CCD cameras - Combustion - Diffusion - Dilution - Flame research - Strain rate

摘要：OH* and CH* chemiluminescence in hydrocarbon flames are often applied to characterize flame structure, equivalence ratio, strain rate, heat release rate, etc. In this study, chemiluminescence images of OH*, CH*, and CO2* in the CH4/ O2 diffusion flame were obtained using a CCD camera imaging system. The effect of CO2 dilution on the flame structure, strain rate, and other flame characteristics of CH4/O2 diffusion flame was discussed. The results show that CO2 dilution greatly affects flame morphology and chemiluminescence intensity. There are quantitative functions between the chemiluminescence peak intensity of OH* and CH* and the CO2 dilution level. The CO2* average intensity in the flame zone is better suited to characterize the dilution level than the CO2* peak intensity. Moreover, the strain rate of CO2-diluted laminar flame is defined. It is found that there is a linear relationship between the thickness of the OH* reaction zone and the square root of the strain rate.