摘要
利用低压层流预混火焰结合同步辐射真空紫外光电离技术和分子束取样质谱技术,探测到并计算了甲醇摩尔掺混比为0%、11%、28%和50%的甲醇/正庚烷/氧气/氩气火焰中62种燃烧中间产物和最终产物的摩尔分数。结果发现,甲醇的加入对正庚烷的消耗速率和大分子裂解没有影响,其主要作用表现在对C1和C2小分子摩尔分数的影响。甲醇的氧化速率比正庚烷快,故用甲醇替换一部分正庚烷后,整体氧化速率加快。甲醇的加入对甲基、乙炔、乙基、乙烷、乙烯酮有抑制作用,对甲醛和乙醛有促进作用。研究结果为今后机理验证模拟提供了实验依据。
An experimental study of the low pressure premixed laminar methanol/n-heptane/oxygen/ argon flame with the methanol mole fraction blend ratio of 0%,11%,28%,50%was performed with the tunable synchrotron vacuum ultra-violet（VUV） photoionization and molecular-beam sampling mass spectrometry.62 kinds of combustion intermediates and final products were detected as well as their mole fractions.The results show that the consumption rate of n-heptane and the dissociation of large molecular are not impacted by the methanol addition,the effect of methanol behaviors at the small C1 and C2 moleculars.The oxidation rate of methanol is larger than that of n-heptane,so with the methanol addition increase,the overall reaction rate increases.At the same time the equivalent concentrations of methyl,acetylene,ethyl,ethane and keterie decrease with the increase of methanol but formaldehyde and acetaldehyde increase.The experiment provides the valuable data for the validation of mechanism in the future.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第4期715-719,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金课题(No.50876075)
教育部博士点基金课题(No.200800560040)
关键词
甲醇
正庚烷
低压层流预混火焰
同步辐射
methanol
n-heptane
low pressure premixed laminar flame
synchrotron radiation
