Visible and U.V. Spectral Emission and Extinction Measurements in Oil Spray Flame
Visible and U.V. Spectral Emission and Extinction Measurements in Oil Spray Flame
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可见光和紫外线
DOI：
10.1080/00102208008952369
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发表时间：
1980
影响因子：
1.9
通讯作者：
C. Noviello
中科院分区：
文献类型：
--
作者：
F. Beretta;A. Cavaliere;A. D'alessio;C. Noviello
摘要对可变旋流燃烧器上产生的垂直无约束燃油火焰进行了沿着轴向的可见光和紫外线的排放和消光测量。燃料的流速约为6 Kg/hr，理论当量比在0.9至1.15之间变化。由于自由基OH，CH和C2的排放进行了比较，由于烟尘颗粒的连续排放。亮度和色温的轮廓是从光谱范围4000 - 8000 A的连续谱的绝对强度的测量中获得的。在燃烧器喷嘴附近，色温远高于亮温，而在火焰的最后部分，两者的差值减小。在火焰的第一部分中，由于燃料液滴蒸发，λ = 6500 A处的单色消光系数减小，但在烟灰形成过程占主导地位的下游增加。研究了它在4000 - 8000 A范围内的光谱变化，可以确定它的最大吸收波长。
Abstract Emission and extinction measurements in the visible and U.V. were performed along the axis of vertical unconfined fuel oil flames produced on a variable swirl burner. The flow rate of the fuel was around 6 Kg/hr and the theoretical equivalence ratios was varied from 0.9 to 1.15. The emissions due to the radicals OH, CH and C2 were compared with the continuum emission due to the soot particles. The profiles of the brightness and colour temperature were obtained from the measurements of the absolute intensity of the continuum in the spectral range 4000÷8000A. The colour temperature was much higher than the brightness temperature near the burner nozzle while the difference decreased in the final part of the flames. In the first part of the flame the monochromatic extinction coefficient at λ = 6500A decreases, due to fuel droplets, which are evaporating, but increases downstream where the soot formation process prevails. The study of its spectral variation in the range 4000A-8000A allows the determin...