物理化学学报 >> 1987, Vol. 3 >> Issue (02): 119-122.doi: 10.3866/PKU.WHXB19870203

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激光对火焰的诊断
Ⅱ. 激光诱导荧光法对液化石油气/空气火焰中的OH基浓度二维分布的检测

倪图强; 聂绪建; 俞书勤; 孔繁敖   

  1. 中国科学技术大学近代化学, 安徽合肥
  • 收稿日期:1985-09-03 修回日期:1986-01-17 发布日期:1987-04-15
  • 通讯作者: 孔繁敖

LASER DIAGNOSTICS FOR FLAMES
Ⅱ. THE TWO-DIMENSIONAL CONCENTRATION DISTRIBUTION OF OH (X) IN A HYDROCARBON/AIR FLAME DETECTED BY LASER INDUCED FLUORESCENCE METHOD

Ni Tuqiang; Nie Xujian; Yu Shuqin; Kong Fanao   

  1. Department of Modern Chemistry; The University of Science and Technology of China; Hefei; Anhui
  • Received:1985-09-03 Revised:1986-01-17 Published:1987-04-15
  • Contact: Kong Fanao

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摘要： 通过部份预混的富燃料液化石油气/空气火焰中各部份的OH(A~(2∑~+)←→X ~(2Π))的激光诱导荧光信号进行逐点检测, 获得了OH(X)基在火焰中央纵剖面上精细的二维等浓度线图。OH(X)在外焰边缘上分布最浓, 是自内向外扩散的H原子与O原子相遇而引起反应的结果。同时一部份OH(A)基的生成, 发出了紫外的A→X化学发光, 形成了外焰的轮廓。

Abstract: The in-situ, highly spatial resolution, two-dimensional distribution of OH(X) species in a premixed liquified petroleum gas/air flame is reported. The measure- ment was performed by the saturated laser induced fluorescence method with the tran- sitions of OH (A~(2∑~+), v′=0←→X~(2Π), v″=0). The intensities of the broadband emission reflected the local concent ations of OH(X) in the flame.
The result showed that OH(X) populated at the rim of the visual flame.
State-to-state reactions related to OH(X) radical in flame condition are discussed. OH(X) was produced from the oxidation of small hydrogen-containing radicals. The consumption of OH(X) seemed via reaction (10) and (11). The population of OH(A) species is also discussed.