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Are Sooting Premixed Porous-Plug Burner Flames One-Dimensional? A Laser-Based Experimental Investigation

Olofsson, Nils-Erik LU ; Bladh, Henrik LU ; Bohlin, Alexis LU ; Johnsson, Jonathan LU and Bengtsson, Per-Erik LU (2013) In Combustion Science and Technology 185(2). p.293-309
Abstract
The one-dimensional character of sooting premixed porous-plug (McKenna) burner flames has been examined, motivated by recent investigations where the one-dimensionality has been questioned. The examination employs laser diagnostic techniques to measure different characteristics: temperature using rotational coherent anti-Stokes Raman spectroscopy (CARS) and soot properties using laser-induced incandescence and elastic light scattering. Special attention has been paid to the influence of an outer shroud gas flow of either nitrogen or air. The nitrogen shroud gas leads to flame cooling at the outer edge, whereas the air shroud results in heating through the oxidation of CO/H-2/soot. This generally results in a more inhomogeneous spatial... (More)
The one-dimensional character of sooting premixed porous-plug (McKenna) burner flames has been examined, motivated by recent investigations where the one-dimensionality has been questioned. The examination employs laser diagnostic techniques to measure different characteristics: temperature using rotational coherent anti-Stokes Raman spectroscopy (CARS) and soot properties using laser-induced incandescence and elastic light scattering. Special attention has been paid to the influence of an outer shroud gas flow of either nitrogen or air. The nitrogen shroud gas leads to flame cooling at the outer edge, whereas the air shroud results in heating through the oxidation of CO/H-2/soot. This generally results in a more inhomogeneous spatial particle size profile for the nitrogen shroud flame, with smaller particle sizes at the flame edge. The present results emphasize the need to characterize burner and operating conditions accurately, and also, regarding parameters that at first glance seem less relevant, such as the shroud gas, to provide useful data for comparison between laboratories. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coherent anti-Stokes Raman spectroscopy, Elastic light scattering, Flat, flame, Laser-induced incandescence, Soot
in
Combustion Science and Technology
volume
185
issue
2
pages
293 - 309
publisher
Taylor & Francis
external identifiers
  • wos:000319172500006
  • scopus:84874348037
ISSN
1563-521X
DOI
10.1080/00102202.2012.718006
language
English
LU publication?
yes
id
5f757348-f0a4-44d0-9849-aff4c2d698c0 (old id 3932313)
date added to LUP
2013-07-15 12:57:56
date last changed
2019-02-20 01:35:52
@article{5f757348-f0a4-44d0-9849-aff4c2d698c0,
  abstract     = {The one-dimensional character of sooting premixed porous-plug (McKenna) burner flames has been examined, motivated by recent investigations where the one-dimensionality has been questioned. The examination employs laser diagnostic techniques to measure different characteristics: temperature using rotational coherent anti-Stokes Raman spectroscopy (CARS) and soot properties using laser-induced incandescence and elastic light scattering. Special attention has been paid to the influence of an outer shroud gas flow of either nitrogen or air. The nitrogen shroud gas leads to flame cooling at the outer edge, whereas the air shroud results in heating through the oxidation of CO/H-2/soot. This generally results in a more inhomogeneous spatial particle size profile for the nitrogen shroud flame, with smaller particle sizes at the flame edge. The present results emphasize the need to characterize burner and operating conditions accurately, and also, regarding parameters that at first glance seem less relevant, such as the shroud gas, to provide useful data for comparison between laboratories.},
  author       = {Olofsson, Nils-Erik and Bladh, Henrik and Bohlin, Alexis and Johnsson, Jonathan and Bengtsson, Per-Erik},
  issn         = {1563-521X},
  keyword      = {Coherent anti-Stokes Raman spectroscopy,Elastic light scattering,Flat,flame,Laser-induced incandescence,Soot},
  language     = {eng},
  number       = {2},
  pages        = {293--309},
  publisher    = {Taylor & Francis},
  series       = {Combustion Science and Technology},
  title        = {Are Sooting Premixed Porous-Plug Burner Flames One-Dimensional? A Laser-Based Experimental Investigation},
  url          = {http://dx.doi.org/10.1080/00102202.2012.718006},
  volume       = {185},
  year         = {2013},
}