Two-Dimensional Imaging of OH Radicals in Spark Ignition Kernels by Laser Induced Fluorescence

1993 ◽  
Vol 97 (12) ◽  
pp. 1741-1745 ◽  
Author(s):  
J. Xu ◽  
J. Warnatz
Keyword(s):  
Spark Ignition ◽  
Laser Induced Fluorescence ◽  
Oh Radicals ◽  
Two Dimensional

Simultaneous Two-Dimensional Visualization of Soot and OH in Flames Using Laser-Induced Fluorescence

1996 ◽  
Vol 50 (9) ◽  
pp. 1182-1186 ◽  
Author(s):  
Per-Erik Bengtsson
Keyword(s):  
Laser Radiation ◽  
Detection System ◽  
Frequency Doubling ◽  
Ccd Camera ◽  
Laser Induced Fluorescence ◽  
Oh Radicals ◽  
Single Shot ◽  
Two Dimensional ◽  
Charge Coupled Device ◽  
Reaction Zones

Two-dimensional visualization of soot has been realized in flames with the use of laser-induced fluorescence in C2 from laser-vaporized soot [LIF(C2)LVS]. Soot particles are heated to vaporization temperatures by the absorption of laser radiation. C2 radicals produced by this process are excited at wavelengths around 563 nm through the transition v’ = 0 d3Πg ← v” = 1 a3Πu, and the subsequent fluorescence at ∼516 nm is detected. By frequency-doubling of the laser radiation, wavelengths around 281.5 nm are achieved, which can excite OH radicals to the v’ = 1 A2∑+ state from v” = 0 X2Π, with subsequent fluorescence at ∼310 nm. With the use of both these excitation wavelengths, and a Cassegrainian split-mirror telescope as the imaging detection system in front of the charge-coupled device (CCD) camera, simultaneous two-dimensional single-shot images of soot and OH were obtained on a single CCD chip, thus enabling both sooting regions and reaction zones in flames to be monitored.

scholarly journals Unravelling overlaps and torsion-facilitated coupling using two-dimensional laser-induced fluorescence

2018 ◽  
Vol 117 (21) ◽  
pp. 3011-3026 ◽  
Author(s):  
David J. Kemp ◽  
Adrian M. Gardner ◽  
William D. Tuttle ◽  
Timothy G. Wright
Keyword(s):  
Laser Induced Fluorescence ◽  
Two Dimensional
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