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High-temperature oxidation of acetylene by N2O at high Ar dilution conditions and in laminar premixed C2H2 + O2 + N2 flames

Alekseev, Vladimir A. LU ; Bystrov, Nikita ; Emelianov, Alexander ; Eremin, Alexander ; Yatsenko, Pavel and Konnov, Alexander A. LU (2022) In Combustion and Flame 238.
Abstract

High-temperature oxidation of acetylene (C2H2) is studied behind reflected shock waves and in laminar flames. Atomic resonance absorption spectroscopy (ARAS) is employed to record oxygen atom concentration profiles for the mixture of 10 ppm C2H2 + 10 ppm N2O + argon and temperatures from 1688 K to 3179 K, extending the range of such data available from the literature. Laminar burning velocity of C2H2 in a diluted oxidizer with 11–13% O2 in the O2 + N2 mixture is measured using the heat flux method and compared to the literature data for the 13% O2 mixture. An updated detailed kinetic mechanism is presented to model... (More)

High-temperature oxidation of acetylene (C2H2) is studied behind reflected shock waves and in laminar flames. Atomic resonance absorption spectroscopy (ARAS) is employed to record oxygen atom concentration profiles for the mixture of 10 ppm C2H2 + 10 ppm N2O + argon and temperatures from 1688 K to 3179 K, extending the range of such data available from the literature. Laminar burning velocity of C2H2 in a diluted oxidizer with 11–13% O2 in the O2 + N2 mixture is measured using the heat flux method and compared to the literature data for the 13% O2 mixture. An updated detailed kinetic mechanism is presented to model and analyze the results, and the selection of rate constants in the C2H2 sub-mechanism, whose importance was identified by the sensitivity analysis, is discussed. The performance of the new model is compared against several reaction schemes available from the literature, and kinetic differences between them are outlined. The new shock-wave data helped to improve the performance of the present model compared to its previous version. For the laminar flames, a particular importance of reactions involving C2H3 is identified, however, the reasons for the observed differences in model predictions are to a large extent located outside the C2H2 sub-mechanism, which were also identified.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acetylene, Atomic resonance absorption spectroscopy (ARAS), Burning velocity, NO, Shock wave
in
Combustion and Flame
volume
238
article number
111924
publisher
Elsevier
external identifiers
  • scopus:85121417303
ISSN
0010-2180
DOI
10.1016/j.combustflame.2021.111924
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Author(s)
id
15f997d9-9817-482d-a499-c74b039f7663
date added to LUP
2022-01-11 17:12:43
date last changed
2022-04-19 19:07:10
@article{15f997d9-9817-482d-a499-c74b039f7663,
  abstract     = {{<p>High-temperature oxidation of acetylene (C<sub>2</sub>H<sub>2</sub>) is studied behind reflected shock waves and in laminar flames. Atomic resonance absorption spectroscopy (ARAS) is employed to record oxygen atom concentration profiles for the mixture of 10 ppm C<sub>2</sub>H<sub>2</sub> + 10 ppm N<sub>2</sub>O + argon and temperatures from 1688 K to 3179 K, extending the range of such data available from the literature. Laminar burning velocity of C<sub>2</sub>H<sub>2</sub> in a diluted oxidizer with 11–13% O<sub>2</sub> in the O<sub>2</sub> + N<sub>2</sub> mixture is measured using the heat flux method and compared to the literature data for the 13% O<sub>2</sub> mixture. An updated detailed kinetic mechanism is presented to model and analyze the results, and the selection of rate constants in the C<sub>2</sub>H<sub>2</sub> sub-mechanism, whose importance was identified by the sensitivity analysis, is discussed. The performance of the new model is compared against several reaction schemes available from the literature, and kinetic differences between them are outlined. The new shock-wave data helped to improve the performance of the present model compared to its previous version. For the laminar flames, a particular importance of reactions involving C<sub>2</sub>H<sub>3</sub> is identified, however, the reasons for the observed differences in model predictions are to a large extent located outside the C<sub>2</sub>H<sub>2</sub> sub-mechanism, which were also identified.</p>}},
  author       = {{Alekseev, Vladimir A. and Bystrov, Nikita and Emelianov, Alexander and Eremin, Alexander and Yatsenko, Pavel and Konnov, Alexander A.}},
  issn         = {{0010-2180}},
  keywords     = {{Acetylene; Atomic resonance absorption spectroscopy (ARAS); Burning velocity; NO; Shock wave}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Combustion and Flame}},
  title        = {{High-temperature oxidation of acetylene by N<sub>2</sub>O at high Ar dilution conditions and in laminar premixed C<sub>2</sub>H<sub>2</sub> + O<sub>2</sub> + N<sub>2</sub> flames}},
  url          = {{http://dx.doi.org/10.1016/j.combustflame.2021.111924}},
  doi          = {{10.1016/j.combustflame.2021.111924}},
  volume       = {{238}},
  year         = {{2022}},
}