Isotope Shift/Planar Laser Induced Fluorescence Diagnostics for Examining Hydrogen-Methane Flames

2005 ◽  
Author(s):  
Atsushi Katoh ◽  
Hiroyuki Oyama ◽  
Kuniyuki Kitagawa ◽  
Ashwani Gupta
Keyword(s):  
Isotope Shift ◽  
Laser Induced Fluorescence ◽  
Planar Laser Induced Fluorescence ◽  
Fluorescence Diagnostics ◽  
Planar Laser ◽  
Methane Flames

OH Planar Laser-Induced Fluorescence and Emission Imaging in High Pressure LOx/Methane Flames

2007 ◽  
Vol 23 (3) ◽  
pp. 593-602 ◽  
Author(s):  
Ghislain Singla ◽  
Philippe Scouflaire ◽  
Juan Carlos Rolon ◽  
Sébastien Candel ◽  
Lucien Vingert
Keyword(s):  
High Pressure ◽  
Laser Induced Fluorescence ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser ◽  
Methane Flames ◽  
Lox Methane

Analysis of flame structure by isotope shift-planar laser induced fluorescence spectrometry of trace OH and OD Radicals

2013 ◽  
Vol 106 ◽  
pp. 334-339 ◽  
Author(s):  
Tsuyoshi Kajimoto ◽  
Eisuke Yamada ◽  
Masahisa Shinoda ◽  
Nelfa Desmira ◽  
Kuniyuki Kitagawa ◽  
...  
Keyword(s):  
Isotope Shift ◽  
Flame Structure ◽  
Laser Induced Fluorescence ◽  
Fluorescence Spectrometry ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser

Planar Laser-Induced Fluorescence Diagnostics of Pulsed Laser Ablation of Silicon

1995 ◽  
Vol 388 ◽  
Author(s):  
D. G. Goodwin ◽  
D. L. Capewell ◽  
P. H. Paul
Keyword(s):  
Laser Ablation ◽  
Ground State ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Laser Induced Fluorescence ◽  
Time Sequence ◽  
Planar Laser Induced Fluorescence ◽  
Fluorescence Diagnostics ◽  
Planar Laser ◽  
Background Gas

AbstractPlanar laser-induced fluorescence has been used to acquire time sequence images of ground-state, neutral Si and SiO during laser ablation of an Si target in vacuum and in the presence of a background gas at a fluence of 3-4 J/cm2. the SiO images, taken in air, strongly suggest that the observed SiO is created through reaction of silicon with oxygen at the contact front as the plume expands.

Visualization of Steam Addition Effect on OH Distribution in a Flame by Isotope Shift/Planar Laser-Induced Fluorescence (IS/PLIF) Spectroscopy

2004 ◽  
Vol 128 (1) ◽  
pp. 8-12 ◽  
Author(s):  
Atsushi Katoh ◽  
Masahisa Shinoda ◽  
Kuniyuki Kitagawa ◽  
Ashwani K. Gupta
Keyword(s):  
Isotope Shift ◽  
Equivalence Ratio ◽  
Total Concentration ◽  
Combustion Process ◽  
Laser Induced Fluorescence ◽  
Oh Radicals ◽  
Percentage Increase ◽  
Dissociation Reaction ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser

Addition of steam to a flame has important implications in the combustion process. The dissociation of the added steam (e.g., H2O↔H+OH, etc.) is one of the effects that contribute to the production of radical species, such as OH, H, and O, in the flame. In order to distinctly visualize two types of OH radicals produced from the fuel-air combustion reaction and that from the dissociation reaction with the added steam, we have developed a new method for planar laser-induced fluorescence spectroscopy in combination with isotope shift (herein called IS/PLIF spectroscopy). This technique has been applied to examine a methane-oxygen-nitrogen premixed flame. Two-dimensional fluorescence intensity distributions of OH radicals in the flames were monitored under three different conditions. They include without steam addition, with H2O steam addition, and with D2O steam addition. From the experimental data obtained under the three conditions, the distinction between the two types of OH radicals could be obtained. The results showed that steam addition reduced the total concentration of OH produced from the combustion and dissociation reactions and that the dissociation reaction of the added steam contributed to the production of OH. Furthermore, the results indicated that the percentage decrease in OH from fuel-air combustion reactions due to the temperature decrease effect with steam addition was almost independent of the equivalence ratio during combustion. In contrast, the percentage increase in OH produced from dissociation reaction with the steam depended on the equivalence ratio.

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