掺混甲烷对预混合乙烯火焰碳烟粒径分布的影响  

Effect of Methane Blending on Particle Size Distribution of Premixed Ethylene Flame

作　　者：顾浩[1] 翟佳琦 林柏洋 林赫[1] 

机构地区：[1]上海交通大学,上海200240

出　　处：《内燃机与配件》2018年第3期35-37,共3页Internal Combustion Engine & Parts

基　　金：国家自然科学基金(批准号51210010和91441129);国家重点基础研究发展计划(973)项目(批准号:2013CB228502)

摘　　要：本文以当量比为1.9、模拟最高火焰温度为1727K的乙烯预混火焰为基准,在燃料中分别掺混5%、20%和35%摩尔分数的甲烷,保持当量比和最高火焰温度不变,采用稳定滞止(Burner Stabilized Stagnation,BSS)火焰小孔采样结合扫描电迁移率粒径谱仪(Scanning Mobility Particle Sizer,SMPS)的实验方法,在不同火焰高度上定量测量其生成碳烟颗粒的粒径分布(Particle Size Distribution Function,PSDF),探究掺混甲烷对乙烯预混火焰成烟特性的影响。实验发现,随着甲烷掺混比的增加,生成碳烟颗粒的成核与长大速度越来越小。在所研究的预混火焰工况条件下,乙烯与甲烷在碳烟生成特性方面并不存在协同效应。In this study, the methane blending effect on soot formation was investigated based on a premixed ethylene flame, whose equivalence ratio was 1.9 and calculated maximum flame temperature was 1727 K. Different ratios of methane was mixed into the ethylene flame, keeping the same equivalenceratio and maximum flame temperature. The particle size distribution function（PSDF） was measured in the burner stabilized stagnation（BSS） flame configuration, coupled with micro-orifice probe sampling technique and the scanning mobility particle sizer（SMPS）. It was observed that with the increase of methane mixing ratio, the nucleation and growth rate of soot particles became smaller. Under the conditions of the premixed flame studied, there was no synergistic effect between ethylene and methane on soot formation characteristics.

关 键 词：甲烷掺混 预混火焰 碳烟 粒径分布 协同效应 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]