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通过对部份预混的富燃料液化石油气/空气火焰中各部份的C2(A~(3Π) X~(3Π)和CH(B~(2∑)←X~(2Π),(A~(2Δ)→X~(2Π))的激光诱导荧光信号进行逐点检测,首次获得了C_2(X)和CH(X)基在火焰中央纵剖面上的二维等浓度线分布图。它们的分布都在内焰锥形的壳层上,而以锥顶区域最浓。C_2主要来自热解,并可进一步聚成碳核。CH的形成是来自小自由基和含氧化合物的反应,它进一步燃烧成终产物。
Through the analysis of C2 (A ~ (3Π) X ~ (3Π) and CH (B ~ (2Σ) ← X ~ (2Π)) in each part of pre-mixed LPG / ~ (2Δ) → X ~ (2Π)), the two-dimensional isochoric concentration profiles of C_2 (X) and CH (X) radicals on the flame central longitudinal section were obtained for the first time. Are distributed in the inner flame conical shell, while the cone top area is the most concentrated.C_2 mainly comes from pyrolysis and can be further aggregated into carbon nuclei.CH is formed from the reaction of small free radicals and oxygenates, It further burns into the end product.