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Soot-visualization strategies using laser techniques - Laser-induced fluorescence in C2 from laser-vaporized soot and laser-induced soot incandescence

Bengtsson, P. E. LU and Aldén, Marcus LU (1995) In Applied Physics B 60(1). p.51-59
Abstract

Strategies for spatially resolved soot volume-fraction measurements have been investigated in sooting laboratory flames with known soot characteristics. Two techniques were compared: Laser-Induced Fluorescence in C2 from Laser-Vaporized Soot (LIF(C2)LVS), and Laser-Induced Incandescence of soot (LII). The LII signal is the increased temperature radiation from soot particles which have been heated to temperatures of several thousand degrees as a consequence of absorption of laser radiation. The LIF(C2)LVS technique is based on the production of C2 radicals from laser-vaporized soot which occurs for laser intensities ≥107 W/cm2. A laser wavelength is chosen such that... (More)

Strategies for spatially resolved soot volume-fraction measurements have been investigated in sooting laboratory flames with known soot characteristics. Two techniques were compared: Laser-Induced Fluorescence in C2 from Laser-Vaporized Soot (LIF(C2)LVS), and Laser-Induced Incandescence of soot (LII). The LII signal is the increased temperature radiation from soot particles which have been heated to temperatures of several thousand degrees as a consequence of absorption of laser radiation. The LIF(C2)LVS technique is based on the production of C2 radicals from laser-vaporized soot which occurs for laser intensities ≥107 W/cm2. A laser wavelength is chosen such that besides vaporizizng the soot, it also excites the C2 radicals, and the subsequent C2 fluorescence signal is detected. The signals from both techniques showed good correlation with soot volume fractions in the studied flame. The dependence of the signals on experimental parameters was studied, and the influence of interfering radiation, such as background flame luminosity and fluorescence from polyaromatic hydrocarbons, on studied signals was established. The potential of the two techniques for imaging of soot volume fractions in laboratory flames was demonstrated. Advantages and disadvantages of the studied techniques are discussed. © 1995 Springer-Verlag.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
42.80
in
Applied Physics B
volume
60
issue
1
pages
9 pages
publisher
Springer
external identifiers
  • Scopus:0003135518
ISSN
0946-2171
DOI
10.1007/BF01082073
language
English
LU publication?
yes
id
910f697e-26cd-4ea4-8641-90861acf0657
date added to LUP
2016-06-29 16:59:36
date last changed
2016-10-13 05:11:06
@misc{910f697e-26cd-4ea4-8641-90861acf0657,
  abstract     = {<p>Strategies for spatially resolved soot volume-fraction measurements have been investigated in sooting laboratory flames with known soot characteristics. Two techniques were compared: Laser-Induced Fluorescence in C<sub>2</sub> from Laser-Vaporized Soot (LIF(C<sub>2</sub>)LVS), and Laser-Induced Incandescence of soot (LII). The LII signal is the increased temperature radiation from soot particles which have been heated to temperatures of several thousand degrees as a consequence of absorption of laser radiation. The LIF(C<sub>2</sub>)LVS technique is based on the production of C<sub>2</sub> radicals from laser-vaporized soot which occurs for laser intensities ≥10<sup>7</sup> W/cm<sup>2</sup>. A laser wavelength is chosen such that besides vaporizizng the soot, it also excites the C<sub>2</sub> radicals, and the subsequent C<sub>2</sub> fluorescence signal is detected. The signals from both techniques showed good correlation with soot volume fractions in the studied flame. The dependence of the signals on experimental parameters was studied, and the influence of interfering radiation, such as background flame luminosity and fluorescence from polyaromatic hydrocarbons, on studied signals was established. The potential of the two techniques for imaging of soot volume fractions in laboratory flames was demonstrated. Advantages and disadvantages of the studied techniques are discussed. © 1995 Springer-Verlag.</p>},
  author       = {Bengtsson, P. E. and Aldén, Marcus},
  issn         = {0946-2171},
  keyword      = {42.80},
  language     = {eng},
  number       = {1},
  pages        = {51--59},
  publisher    = {ARRAY(0x9dd6d88)},
  series       = {Applied Physics B},
  title        = {Soot-visualization strategies using laser techniques - Laser-induced fluorescence in C<sub>2</sub> from laser-vaporized soot and laser-induced soot incandescence},
  url          = {http://dx.doi.org/10.1007/BF01082073},
  volume       = {60},
  year         = {1995},
}