【摘要】 利用同步辐射真空紫外单光子电离结合分子束质谱技术,对当量比φ=1.5的低压预混层流二甲醚火焰进行了实验研究。通过测量光电离质谱和光电离效率曲线,探测到了二甲醚/氧气/氩气的燃烧产物和火焰中间物,包括不稳定的分子和自由基。通过测量离子信号的空间分布曲线,计算了二甲醚/氧气/氩气火焰的主要物种C₂H₆O、O₂、Ar、H₂、H₂O、CO和CO₂的摩尔分数曲线,以及主要中间物种如CH₂O、C₂H₂、C₂H₄、CH₃OH、C₂H₂O、C₂H₄O、CH₃、CH₄、HCO、C₃H₃和C₃H₄的摩尔分数曲线,并分析了主要中间物种的产生和消耗过程。更多还原

【Abstract】 The low-pressure premixed laminar dimethyl ether/oxygen/argon flame with an equivalence ratio of 1.5 is studied using molecular beam mass spectrometry combined with synchrotron radiation photoionization technology.By measuring the photoionization efficiency curves,flame species are unambiguously identified,including those unstable molecules and free radicals.By measuring the signal intensities relative to the distances from the burner surface,mole fraction profiles of the major species and the major intermediates are derived.Meanwhile,the production and consumption pathways of those intermediates are analyzed.更多还原