Flame Temperature Measurement by Redistribution of Rotational Population in Laser-Excited Fluorescence: An Application to the OH Radical in a Methane-Air Flame
Flame Temperature Measurement by Redistribution of Rotational Population in Laser-Excited Fluorescence: An Application to the OH Radical in a Methane-Air Flame
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通过激光激发荧光中旋转粒子数的重新分布测量火焰温度：在甲烷-空气火焰中 OH 自由基的应用
DOI：
10.1366/0003702814732319
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
J. Winefordner
中科院分区：
文献类型：
--
作者：
G. Zizak;J. Horvath;J. Winefordner
特别考虑火焰中的温度测量，导出了稳态激光激发下旋转弛豫布居数密度的表达式。发展的理论与实验测量的转动分布是一致的。实验用闪光灯染料激光器(长脉冲)和氮气激光泵浦的染料激光器(短脉冲)进行。这两种分布是一致的，表明甲烷-空气火焰中OH自由基的驰豫与快碰撞速率常数有关。热辅助荧光技术已被证明在燃烧诊断中提供了可靠的结果。
Expressions for the rotationally relaxed population densities, under steady state laser excitation, have been derived with particular concern to the temperature measurement in flames. Agreement has been found between the developed theory and the measured rotational distribution. The experiments were carried out with both a flash lamp dye laser (long pulses) and a nitrogen laser-pumped dye laser (short pulses). The two distributions were found identical, showing that fast collisional rate constants are involved in the relaxation of the OH radical in a methane-air flame. The thermally assisted fluorescence technique has been proved to give reliable results in combustion diagnostics.