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Vibrational CARS thermometry in sooty flames: Quantitative evaluation of C2 absorption interference

Bengtsson, Per-Erik LU ; Aldén, Marcus LU ; Kröll, Stefan LU and Nilsson, D (1990) In Combustion and Flame 82(2).
Abstract
The application of nitrogen vibrational CARS thermometry to sooty, premixed, atmospheric pressure flames has been investigated using a Nd:YAG laser based system. It was found that laser-produced C2 radicals strongly absorb part of the fundamental band peak in the CARS spectrum. This was the most severe interference to the CARS signal. A quantitative investigation of temperature errors caused by the C2 absorption effect is presented. The correlation between the absorption interference and the soot volume fraction was examined for different flame conditions. Also, the increase of the nonresonant susceptibility in sooty flame regions is clearly illustrated and its effect on thev evaluated temperature is quantitatively determined. The... (More)
The application of nitrogen vibrational CARS thermometry to sooty, premixed, atmospheric pressure flames has been investigated using a Nd:YAG laser based system. It was found that laser-produced C2 radicals strongly absorb part of the fundamental band peak in the CARS spectrum. This was the most severe interference to the CARS signal. A quantitative investigation of temperature errors caused by the C2 absorption effect is presented. The correlation between the absorption interference and the soot volume fraction was examined for different flame conditions. Also, the increase of the nonresonant susceptibility in sooty flame regions is clearly illustrated and its effect on thev evaluated temperature is quantitatively determined. The single-shot temperature standard deviation has also been investigated in flames with different soot loadings. Finally, other interference effects to the CARS signals in sooty flames are described and discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Combustion and Flame
volume
82
issue
2
publisher
Elsevier
external identifiers
  • Scopus:0025228023
ISSN
0010-2180
DOI
10.1016/0010-2180(90)90098-C
language
English
LU publication?
yes
id
3dad5a00-d16d-43c4-9896-8e1a18c25e22 (old id 2257518)
date added to LUP
2012-02-23 23:19:08
date last changed
2016-10-13 04:25:02
@misc{3dad5a00-d16d-43c4-9896-8e1a18c25e22,
  abstract     = {The application of nitrogen vibrational CARS thermometry to sooty, premixed, atmospheric pressure flames has been investigated using a Nd:YAG laser based system. It was found that laser-produced C2 radicals strongly absorb part of the fundamental band peak in the CARS spectrum. This was the most severe interference to the CARS signal. A quantitative investigation of temperature errors caused by the C2 absorption effect is presented. The correlation between the absorption interference and the soot volume fraction was examined for different flame conditions. Also, the increase of the nonresonant susceptibility in sooty flame regions is clearly illustrated and its effect on thev evaluated temperature is quantitatively determined. The single-shot temperature standard deviation has also been investigated in flames with different soot loadings. Finally, other interference effects to the CARS signals in sooty flames are described and discussed.},
  author       = {Bengtsson, Per-Erik and Aldén, Marcus and Kröll, Stefan and Nilsson, D},
  issn         = {0010-2180},
  language     = {eng},
  number       = {2},
  publisher    = {ARRAY(0xb054680)},
  series       = {Combustion and Flame},
  title        = {Vibrational CARS thermometry in sooty flames: Quantitative evaluation of C2 absorption interference},
  url          = {http://dx.doi.org/10.1016/0010-2180(90)90098-C},
  volume       = {82},
  year         = {1990},
}