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Rotational CARS N-2 thermometry: validation experiments for the influence of nitrogen spectral line broadening by hydrogen

Bohlin, Alexis LU ; Vestin, Fredrik LU ; Bonamy, Jeanine; Joubert, Pierre and Bengtsson, Per-Erik LU (2010) 8th European Conference on Nonlinear Spectroscopy (ECONOS)/28th Workshop on Coherent Antistokes Raman Scattering (CARS) Spectroscopy In Journal of Raman Spectroscopy 41(8). p.875-881
Abstract
Rotational coherent anti-Stokes Raman spectroscopy (CARS) in fuel-rich hydrocarbon flames, with a large content of hydrogen in the product gases (similar to 20%), has in previous work shown that evaluated temperatures are raised several tens of Kelvin by taking newly derived N-2-H-2 Raman line widths into account. To validate these results, in this work calibrated temperature measurements at around 300, 500 and 700 K were performed in a cell with binary gas mixtures of nitrogen and hydrogen. The temperature evaluation was made with respect to Raman line widths either from self-broadened nitrogen only, N-2-N-2 [energy-corrected-sudden (ECS)], or by also taking nitrogen broadened by hydrogen, N-2-H-2 [Robert-Bonamy (RB)], Raman line widths... (More)
Rotational coherent anti-Stokes Raman spectroscopy (CARS) in fuel-rich hydrocarbon flames, with a large content of hydrogen in the product gases (similar to 20%), has in previous work shown that evaluated temperatures are raised several tens of Kelvin by taking newly derived N-2-H-2 Raman line widths into account. To validate these results, in this work calibrated temperature measurements at around 300, 500 and 700 K were performed in a cell with binary gas mixtures of nitrogen and hydrogen. The temperature evaluation was made with respect to Raman line widths either from self-broadened nitrogen only, N-2-N-2 [energy-corrected-sudden (ECS)], or by also taking nitrogen broadened by hydrogen, N-2-H-2 [Robert-Bonamy (RB)], Raman line widths into account. With increased amount of hydrogen in the cell at constant temperature, the evaluated CARS temperatures were clearly lowered with the use of Raman line widths from self-broadened nitrogen only, and the case with inclusion of N-2-H-2 Raman line widths was more successful. The difference in evaluated temperatures between the two different sets increases approximately linearly, reaching 20 K (at T similar to 300 K), 43 K (at T = 500 K) and 61 K (at T = 700 K) at the highest hydrogen concentration (90%). The results from this work further emphasize the importance of using adequate Raman line widths for accurate rotational CARS thermometry. Copyright (C) 2010 John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
rotational coherent anti-Stokes Raman spectroscopy, N-2-H-2 Raman line, thermometry, widths
in
Journal of Raman Spectroscopy
volume
41
issue
8
pages
875 - 881
publisher
John Wiley & Sons
conference name
8th European Conference on Nonlinear Spectroscopy (ECONOS)/28th Workshop on Coherent Antistokes Raman Scattering (CARS) Spectroscopy
external identifiers
  • wos:000282406800008
  • scopus:77957338976
ISSN
0377-0486
DOI
10.1002/jrs.2663
language
English
LU publication?
yes
id
52537aa0-abba-4eb0-b3a0-c3e2c4672837 (old id 1727014)
date added to LUP
2010-11-26 14:58:54
date last changed
2018-05-29 10:00:09
@inproceedings{52537aa0-abba-4eb0-b3a0-c3e2c4672837,
  abstract     = {Rotational coherent anti-Stokes Raman spectroscopy (CARS) in fuel-rich hydrocarbon flames, with a large content of hydrogen in the product gases (similar to 20%), has in previous work shown that evaluated temperatures are raised several tens of Kelvin by taking newly derived N-2-H-2 Raman line widths into account. To validate these results, in this work calibrated temperature measurements at around 300, 500 and 700 K were performed in a cell with binary gas mixtures of nitrogen and hydrogen. The temperature evaluation was made with respect to Raman line widths either from self-broadened nitrogen only, N-2-N-2 [energy-corrected-sudden (ECS)], or by also taking nitrogen broadened by hydrogen, N-2-H-2 [Robert-Bonamy (RB)], Raman line widths into account. With increased amount of hydrogen in the cell at constant temperature, the evaluated CARS temperatures were clearly lowered with the use of Raman line widths from self-broadened nitrogen only, and the case with inclusion of N-2-H-2 Raman line widths was more successful. The difference in evaluated temperatures between the two different sets increases approximately linearly, reaching 20 K (at T similar to 300 K), 43 K (at T = 500 K) and 61 K (at T = 700 K) at the highest hydrogen concentration (90%). The results from this work further emphasize the importance of using adequate Raman line widths for accurate rotational CARS thermometry. Copyright (C) 2010 John Wiley & Sons, Ltd.},
  author       = {Bohlin, Alexis and Vestin, Fredrik and Bonamy, Jeanine and Joubert, Pierre and Bengtsson, Per-Erik},
  booktitle    = {Journal of Raman Spectroscopy},
  issn         = {0377-0486},
  keyword      = {rotational coherent anti-Stokes Raman spectroscopy,N-2-H-2 Raman line,thermometry,widths},
  language     = {eng},
  number       = {8},
  pages        = {875--881},
  publisher    = {John Wiley & Sons},
  title        = {Rotational CARS N-2 thermometry: validation experiments for the influence of nitrogen spectral line broadening by hydrogen},
  url          = {http://dx.doi.org/10.1002/jrs.2663},
  volume       = {41},
  year         = {2010},
}