High-temperature oxidation of acetylene by N2O at high Ar dilution conditions and in laminar premixed C2H2 + O2 + N2 flames
(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.
(Less)
- author
- Alekseev, Vladimir A. LU ; Bystrov, Nikita ; Emelianov, Alexander ; Eremin, Alexander ; Yatsenko, Pavel and Konnov, Alexander A. LU
- organization
- publishing date
- 2022-04
- 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}}, }