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Kinetics of premixed acetaldehyde plus air flames

Christensen, Moah LU ; Abebe, Mengistu T.; Heimdal Nilsson, Elna LU and Konnov, Alexander A. (2015) In Proceedings of the Combustion Institute 35. p.499-506
Abstract
Non-stretched laminar burning velocities, SL, of acetaldehyde + air mixtures at initial gas mixture temperatures, T, of 298, 318, 338, 348 and 358 K are reported for the first time. The flames were stabilized on a perforated plate burner at 1 atm using the heat flux method at conditions where the net heat loss from the flame to the burner is zero. Uncertainties of the measurements were analyzed and assessed experimentally. The overall accuracy of the burning velocities was estimated to be typically better than + 1 cm/s. Experimental results were compared with predictions of several kinetic models from the literature. Recent model of Leplat et al. (2011) [30] developed for acetaldehyde and ethanol oxidation showed the closest agreement with... (More)
Non-stretched laminar burning velocities, SL, of acetaldehyde + air mixtures at initial gas mixture temperatures, T, of 298, 318, 338, 348 and 358 K are reported for the first time. The flames were stabilized on a perforated plate burner at 1 atm using the heat flux method at conditions where the net heat loss from the flame to the burner is zero. Uncertainties of the measurements were analyzed and assessed experimentally. The overall accuracy of the burning velocities was estimated to be typically better than + 1 cm/s. Experimental results were compared with predictions of several kinetic models from the literature. Recent model of Leplat et al. (2011) [30] developed for acetaldehyde and ethanol oxidation showed the closest agreement with the measurements as compared to the Konnov and San Diego models. The effects of initial temperature on the adiabatic laminar burning velocities of acetaldehyde were interpreted using the correlation S-L = S-L0 (T/T-0)(alpha). Particular attention was paid to the variation of the power exponent alpha with equivalence ratio. The existence of a minimum in alpha in the slightly rich mixtures is demonstrated experimentally and confirmed computationally. The model of Leplat et al. was further analyzed using sensitivity analysis and it was concluded that the deviation of the modelled results when comparing with experiments is not a result of the fuel specific reactions but rather the sub-mechanisms of C1 and H-2/O-2. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acetaldehyde, Premixed flame, Burning velocity, Modeling
in
Proceedings of the Combustion Institute
volume
35
pages
499 - 506
publisher
Elsevier
external identifiers
  • wos:000348047500047
  • scopus:84937640256
ISSN
1540-7489
DOI
10.1016/j.proci.2014.06.136
language
English
LU publication?
yes
id
169552e7-fa5f-4ab5-a41d-b6052320f5c8 (old id 5204226)
date added to LUP
2015-03-25 14:56:26
date last changed
2017-03-19 03:20:44
@article{169552e7-fa5f-4ab5-a41d-b6052320f5c8,
  abstract     = {Non-stretched laminar burning velocities, SL, of acetaldehyde + air mixtures at initial gas mixture temperatures, T, of 298, 318, 338, 348 and 358 K are reported for the first time. The flames were stabilized on a perforated plate burner at 1 atm using the heat flux method at conditions where the net heat loss from the flame to the burner is zero. Uncertainties of the measurements were analyzed and assessed experimentally. The overall accuracy of the burning velocities was estimated to be typically better than + 1 cm/s. Experimental results were compared with predictions of several kinetic models from the literature. Recent model of Leplat et al. (2011) [30] developed for acetaldehyde and ethanol oxidation showed the closest agreement with the measurements as compared to the Konnov and San Diego models. The effects of initial temperature on the adiabatic laminar burning velocities of acetaldehyde were interpreted using the correlation S-L = S-L0 (T/T-0)(alpha). Particular attention was paid to the variation of the power exponent alpha with equivalence ratio. The existence of a minimum in alpha in the slightly rich mixtures is demonstrated experimentally and confirmed computationally. The model of Leplat et al. was further analyzed using sensitivity analysis and it was concluded that the deviation of the modelled results when comparing with experiments is not a result of the fuel specific reactions but rather the sub-mechanisms of C1 and H-2/O-2. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.},
  author       = {Christensen, Moah and Abebe, Mengistu T. and Heimdal Nilsson, Elna and Konnov, Alexander A.},
  issn         = {1540-7489},
  keyword      = {Acetaldehyde,Premixed flame,Burning velocity,Modeling},
  language     = {eng},
  pages        = {499--506},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {Kinetics of premixed acetaldehyde plus air flames},
  url          = {http://dx.doi.org/10.1016/j.proci.2014.06.136},
  volume       = {35},
  year         = {2015},
}