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Strategy to diagnose ultra-lean (φ < 0.6) premixed flames by acetone-OH simultaneous PLIF with one-laser and one-detector combination

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Title: Strategy to diagnose ultra-lean (φ < 0.6) premixed flames by acetone-OH simultaneous PLIF with one-laser and one-detector combination
Authors: Nakamura, Yuji Browse this author →KAKEN DB
Yamada, Yuichiro Browse this author
Hirota, Mitsutomo Browse this author →KAKEN DB
Saito, Tsutomu Browse this author →KAKEN DB
Keywords: Flame imaging
Ultra-lean combustion
Issue Date: Feb-2011
Publisher: Springer Berlin / Heidelberg
Journal Title: Journal of Visualization
Volume: 14
Issue: 1
Start Page: 75
End Page: 84
Publisher DOI: 10.1007/s12650-010-0066-6
Abstract: A 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 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.
Rights: The original publication is available at
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中村 祐二

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