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Laser-Induced Incandescence for Soot Particle Size Measurements in Premixed Flat Flames

Axelsson, Boman LU ; Collin, Robert LU and Bengtsson, Per-Erik LU (2000) In Applied Optics 39(21). p.3683-3690
Abstract
Measurements of soot properties by means of laser-induced incandescence (LII) and combined scattering–extinction were performed in well-characterized premixed ethylene–air flames. In particular, the possibility of using LII as a tool for quantitative particle sizing was investigated. Particle sizes were evaluated from the temporal decay of the LII signal combined with heat balance modeling of laser-heated particles, and these sizes were compared with the particle sizes deduced from scattering–extinction measurements based on isotropic sphere theory. The correspondence was good early in the soot-formation process but less good at later stages, possibly because aggregation to clusters began to occur. A critical analysis has been made of how... (More)
Measurements of soot properties by means of laser-induced incandescence (LII) and combined scattering–extinction were performed in well-characterized premixed ethylene–air flames. In particular, the possibility of using LII as a tool for quantitative particle sizing was investigated. Particle sizes were evaluated from the temporal decay of the LII signal combined with heat balance modeling of laser-heated particles, and these sizes were compared with the particle sizes deduced from scattering–extinction measurements based on isotropic sphere theory. The correspondence was good early in the soot-formation process but less good at later stages, possibly because aggregation to clusters began to occur. A critical analysis has been made of how uncertainties in different parameters, both experimental and in the model, affect the evaluated particle sizes for LII. A sensitivity analysis of the LII model identified the ambient-flame temperature as a major source of uncertainty in the evaluated particle size, a conclusion that was supported by an analysis based on temporal LII profiles. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
39
issue
21
pages
3683 - 3690
publisher
OSA
external identifiers
  • scopus:0004290455
ISSN
2155-3165
language
English
LU publication?
yes
id
af346c93-6ead-4766-8a48-4a33168f2c9a (old id 4935727)
alternative location
http://dx.doi.org/10.1364/AO.39.003683
date added to LUP
2015-01-19 14:16:28
date last changed
2017-09-10 04:57:47
@article{af346c93-6ead-4766-8a48-4a33168f2c9a,
  abstract     = {Measurements of soot properties by means of laser-induced incandescence (LII) and combined scattering–extinction were performed in well-characterized premixed ethylene–air flames. In particular, the possibility of using LII as a tool for quantitative particle sizing was investigated. Particle sizes were evaluated from the temporal decay of the LII signal combined with heat balance modeling of laser-heated particles, and these sizes were compared with the particle sizes deduced from scattering–extinction measurements based on isotropic sphere theory. The correspondence was good early in the soot-formation process but less good at later stages, possibly because aggregation to clusters began to occur. A critical analysis has been made of how uncertainties in different parameters, both experimental and in the model, affect the evaluated particle sizes for LII. A sensitivity analysis of the LII model identified the ambient-flame temperature as a major source of uncertainty in the evaluated particle size, a conclusion that was supported by an analysis based on temporal LII profiles.},
  author       = {Axelsson, Boman and Collin, Robert and Bengtsson, Per-Erik},
  issn         = {2155-3165},
  language     = {eng},
  number       = {21},
  pages        = {3683--3690},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Laser-Induced Incandescence for Soot Particle Size Measurements in Premixed Flat Flames},
  volume       = {39},
  year         = {2000},
}