Strategy to diagnose ultra-lean (Φ<0.6) premixed flames by acetone-OH simultaneous PLIF with one-laser and one-detector combination
Strategy to diagnose ultra-lean (Φ<0.6) premixed flames by acetone-OH simultaneous PLIF with one-laser and one-detector combination
复制标题
使用一激光和一探测器组合的丙酮-OH同步 PLIF 诊断超稀（Φ<0.6）预混火焰的策略
DOI：
10.1007/s12650-010-0066-6
复制
发表时间：
2011
影响因子：
1.7
通讯作者：
Y.Nakamura
中科院分区：
文献类型：
--
作者：
K. Uhira;S. Minakuchi and N. Takeda;M. Yamasaki;Katsuji,Tanizawa;Y.Nakamura
摘要提出了一种利用“丙酮-OH同时PLIF”概念通过单激光器和单探测器组合系统诊断超贫火焰的策略。本工作的主要目的是克服我们以前的研究中遇到的困难，即，用于可视化目的的丙酮的接种量必须足够小，以避免其对火焰结构的影响（至少<5%的燃料），同时也必须在这种条件下实现清晰的成像。为此，进行了几个重要的修改：（1）增加了266 nm激发线以改善丙酮的荧光，（2）引入了双峰带通滤光片代替传统的蓝色滤光片，（3）改善了精细丙酮接种的可控性。这些变化对火焰成像的影响也进行了研究。首次用单激光器和单探测器系统成功地实现了极限当量比低于0.6的极贫预混火焰火焰区的清晰可视化。该方法还可以清晰地显示出随时间变化的近熄灭火焰行为，这表明该方法可以用于火焰熄灭研究。图形摘要
AbstractA strategy to diagnose ultra-lean flames utilizing the “acetone-OH simultaneous PLIF” concept via a one-laser and one-detector combination system is presented. The main aim of the present work is to overcome difficulties encountered in our previous studies; namely, that the seeding amount of acetone used for visualization purposes must be sufficiently small in order to avoid its effect on flame structure (at least <5% of fuel), while clear imaging also must be accomplished under such conditions. For this purpose, several important revisions have been made: (1) the 266-nm excitation line has been added to improve the fluorescence from acetone, (2) a dual-peak band-pass filter has been introduced instead of conventional blue filter and (3) controllability of fine acetone seeding has been improved. The effects of these changes on flame imaging are also investigated. Clear visualization of the flame zone of a very lean premixed flame, of which the limiting equivalence ratio is below 0.6, has been successfully achieved for the first time with one-laser and one-detector system. The time-dependent, near-extinction flame behavior is also clearly imaged, suggesting that this method could utilize to investigate the flame extinction study.Graphical Abstract