甲烷同轴射流扩散火焰中自由基的辐射特性  

Radiation Characteristics of Radicals in Methane Co-Flowing Jet Diffusion Flame

作　　者：宋旭东[1] 郭庆华[1] 张婷[1] 陈雪莉[1] 于广锁[1] 

机构地区：[1]煤气化及能源化工教育部重点实验室(华东理工大学),上海市徐汇区200237

出　　处：《中国电机工程学报》2013年第35期50-57,10,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(21176078;21006026);国家重点基础研究计划项目(2010CB227004);中央高校基本科研业务费专项资金资助~~

摘　　要：利用高光谱相机及紫外相机系统,获取CH4/O2同轴射流扩散火焰中CH*和OH*二维辐射发光信息,对火焰辐射特征进行了表征。研究表明:OH*与CH*可以准确地反映扩散火焰内外的结构;在层流状态不同当量比例下OH*分布变化明显,随着当量比例增大,OH*分布范围逐渐变大,逐渐向火焰下游扩展,而CH*主要存在于火焰锋面以内,不随当量比例变化;在湍流条件OH*与CH*分布差别不大,当量比例对其分布范围的影响也降低,随着当量比例的增加OH*与CH*峰值强度也发生变化。The OH^＊ and CH^＊ chemiluminescence in two-dimension, which were used to characterize the flame radiation, was measured in CH4/O2 co-flowing jet diffusion flame by using hyperspectral and ultraviolet cameras. The results show that OH^＊ and CH^＊ chemiluminescence can reflect the structure of diffusion flame accurately. The distributions of OH^＊ and CH^＊ are different with equivalence ratios in laminar and turbulent flows. As the equivalent ratio increases in laminar flows, OH^＊ distribution range gradually becomes large and extends to the downstream, while CH^＊ mainly exists within the flame front that doesn＆#x02019;t change with the equivalence ratios. But in turbulence, the effect of equivalent ratios on radicals＆#x02019; distribution range is reduced, the OH^＊ and CH^＊ peak intensity also changes with equivalent ratios.

关 键 词：同轴射流 扩散火焰 辐射发光 火焰结构 当量比例 

分 类 号：O433[机械工程—光学工程]