层流预混乙烷和丙烯火焰中PAHs荧光光谱分析  

Fluorescence Spectra Analysis on PAHs Formation in Premixed Ethane and Propene Flames

作　　者：贺振武[1] 杨阳[1] 张毅然[1] 刘鹏[1] 管斌[1] 林赫[1] 黄震[1] 

机构地区：[1]动力机械与工程教育部重点实验室(上海交通大学),上海市闵行区200240

出　　处：《中国电机工程学报》2016年第16期4478-4483,4537,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2013CB 228502)~~

摘　　要：应用激光诱导荧光(LIF)技术对层流预混乙烷和丙烯火焰中多环芳香烃(PAHs)荧光光谱进行测量,探究PAHs在乙烷和丙烯层流预混火焰中的空间分布及当量比对其生成的影响。实验研究结果表明:乙烷和丙烯不同火焰高度下PAHs荧光光谱峰值位置不发生转移,均在500nm左右;随着火焰高度的增加,PAHs荧光光谱强度随之增强;当量比对火焰中PAHs的生成具有重要影响,随着当量比的增加,PAHs荧光光谱强度逐渐增强且在较高当量比下变化显著;比较乙烷和丙烯层流预混火焰中PAHs荧光光谱归一化强度,发现燃料碳链长度以及碳链饱和度会对火焰中PAHs的生成产生重要影响。Laser induced fluorescence（LIF） method was used to detect the polycyclic aromatic hydrocarbons（PAHs） in laminar premixed ethane and propene flames to study the distribution of PAHs in flames and the effect of equivalence ratio on PAHs formation. The fluorescence spectra of PAHs in laminar premixed ethane and propene flames ranging from 300 nm to 500 nm can be attributed to the PAHs with one to four benzene rings（A1-A4）. In this study, the intensity of A1-A4 fluorescence were measured, and the peak of PAHs fluorescence spectra held at 500 nm. The intensity of PAHs fluorescence spectra increase with the heights above burner surface. The fuel rich flame is obviously in favor of A1-A4 formation and the fluorescence spectra intensity of A1-A4 increase faster at relatively high equivalent ratios. The normalized intensity of PAHs fluorescence spectra between ethane and propene are compared and find that the length and the saturability of carbon chain have a significant effect on PAHs formation.

关 键 词：激光诱导荧光(LIF) 多环芳香烃(PAHs) 层流预混火焰 乙烷和丙烯 荧光光谱 

分 类 号：TM[电气工程]