Hirano A, Tsujishita M
Appl Opt. 1994 Nov 20;33(33):7777-80. doi: 10.1364/AO.33.007777.
CN is known to be the important species in forming NO(x) in hydrocarbon-air flames, and we describe the qualitative mapping of the CN distribution of the order of less than 1 in 10(6) at atmospheric pressure in a cross section of an unseeded turbulent CH(4)-air flame by the use of a single-shot laser pulse with planar laser-induced fluorescence. We obtained the results by comparing the different excitation-detection schemes to find the most appropriate scheme for visualization. In addition, the images obtained have good spatial resolution of 200 µm. Based on a laminar flame experiment with the same optical systems, it is observed that the CN distribution zone is located outside of the inner cone even at atmospheric pressure.
已知在烃类-空气火焰中，CN 是形成 NO(x) 的重要物种，我们通过使用单脉冲激光和平面激光诱导荧光，描述了在常压下未加种子的湍流 CH(4)-空气火焰横截面中 CN 分布的定性图谱，其数量级小于 10^6 分之一。我们通过比较不同的激发-检测方案来获得结果，以找到最适合可视化的方案。此外，所获得的图像具有 200 µm 的良好空间分辨率。基于使用相同光学系统的层流火焰实验，观察到即使在常压下，CN 分布区域也位于内锥之外。
