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Simultaneous two-dimensional visualization of soot and OH in flames using laser-induced fluorescence

Bengtsson, Per Erik LU orcid (1996) In Applied Spectroscopy 50(9). p.1182-1186
Abstract

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 ν′ = 0 d3∏g←ν″ = 1 a3∏u, and the subsequent fluorescence at approximately 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 ν′ = 1 A2Σ+ state from ν″ = 0 X2∏, with subsequent fluorescence at... (More)

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 ν′ = 0 d3∏g←ν″ = 1 a3∏u, and the subsequent fluorescence at approximately 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 ν′ = 1 A2Σ+ state from ν″ = 0 X2∏, with subsequent fluorescence at approximately 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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
in
Applied Spectroscopy
volume
50
issue
9
pages
5 pages
publisher
Society for Applied Spectroscopy
external identifiers
  • scopus:0030230687
ISSN
0003-7028
language
English
LU publication?
yes
id
e86ed0b9-fbf4-4488-997a-acfe21e20e30
date added to LUP
2016-06-29 17:42:41
date last changed
2022-03-24 00:08:42
@article{e86ed0b9-fbf4-4488-997a-acfe21e20e30,
  abstract     = {{<p>Two-dimensional visualization of soot has been realized in flames with the use of laser-induced fluorescence in C<sub>2</sub> from laser-vaporized soot [LIF(C<sub>2</sub>)LVS]. Soot particles are heated to vaporization temperatures by the absorption of laser radiation. C<sub>2</sub> radicals produced by this process are excited at wavelengths around 563 nm through the transition ν′ = 0 d<sup>3</sup>∏<sub>g</sub>←ν″ = 1 a<sup>3</sup>∏<sub>u</sub>, and the subsequent fluorescence at approximately 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 ν′ = 1 A<sup>2</sup>Σ<sup>+</sup> state from ν″ = 0 X<sup>2</sup>∏, with subsequent fluorescence at approximately 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.</p>}},
  author       = {{Bengtsson, Per Erik}},
  issn         = {{0003-7028}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{1182--1186}},
  publisher    = {{Society for Applied Spectroscopy}},
  series       = {{Applied Spectroscopy}},
  title        = {{Simultaneous two-dimensional visualization of soot and OH in flames using laser-induced fluorescence}},
  volume       = {{50}},
  year         = {{1996}},
}