Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Chemical structure of atmospheric pressure premixed laminar formic acid/hydrogen flames. / Osipova, K. N.; Sarathy, S. Mani; Korobeinichev, O. P. и др.
в: Proceedings of the Combustion Institute, Том 38, № 2, 01.2021, стр. 2379-2386.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Chemical structure of atmospheric pressure premixed laminar formic acid/hydrogen flames
AU - Osipova, K. N.
AU - Sarathy, S. Mani
AU - Korobeinichev, O. P.
AU - Shmakov, A. G.
N1 - Publisher Copyright: © 2020
PY - 2021/1
Y1 - 2021/1
N2 - The work presents an experimental and kinetic modeling study of laminar premixed formic acid [HC(O)OH]/H 2 /O 2 /Ar flames at different equivalence ratios (ϕ= 0.85, 1.1 and 1.3) stabilized on a flat burner at atmospheric pressure, as well as laminar flame speed of HC(O)OH/O 2 /Ar flames (ϕ= 0.5-1.5) at 1 atm. Flame structure as well as laminar flame speed were simulated using three different detailed chemical kinetic mechanisms proposed for formic acid oxidation. The components in the fuel blends show different consumption profiles, namely, hydrogen is consumed slower than formic acid. According to kinetic analysis, the reason of the observed phenomenon is that the studied flames have hydrogen as a fuel but also as an intermediate product formed from HC(O)OH decomposition. Comparison of the measured and simulated flame structure shows that all the mechanisms satisfactorily predict the mole fraction profiles of the reactants, main products, and intermediates. It is noteworthy that the mechanisms proposed by Glarborg et al., Konnov et al. and the updated AramcoMech2.0 adequately predict the spatial variations in the mole fractions of free radicals, such as H, OH O and HO 2. However, some drawbacks of the mechanisms used were identified; in particular, they predict different concentrations of CH 2 O. As for laminar flame speed simulations, the Konnov et al. mechanism predicts around two times higher values than in experiment, while the Glarborg et al. and updated AramcoMech2.0 show good agreement with the experimental data.
AB - The work presents an experimental and kinetic modeling study of laminar premixed formic acid [HC(O)OH]/H 2 /O 2 /Ar flames at different equivalence ratios (ϕ= 0.85, 1.1 and 1.3) stabilized on a flat burner at atmospheric pressure, as well as laminar flame speed of HC(O)OH/O 2 /Ar flames (ϕ= 0.5-1.5) at 1 atm. Flame structure as well as laminar flame speed were simulated using three different detailed chemical kinetic mechanisms proposed for formic acid oxidation. The components in the fuel blends show different consumption profiles, namely, hydrogen is consumed slower than formic acid. According to kinetic analysis, the reason of the observed phenomenon is that the studied flames have hydrogen as a fuel but also as an intermediate product formed from HC(O)OH decomposition. Comparison of the measured and simulated flame structure shows that all the mechanisms satisfactorily predict the mole fraction profiles of the reactants, main products, and intermediates. It is noteworthy that the mechanisms proposed by Glarborg et al., Konnov et al. and the updated AramcoMech2.0 adequately predict the spatial variations in the mole fractions of free radicals, such as H, OH O and HO 2. However, some drawbacks of the mechanisms used were identified; in particular, they predict different concentrations of CH 2 O. As for laminar flame speed simulations, the Konnov et al. mechanism predicts around two times higher values than in experiment, while the Glarborg et al. and updated AramcoMech2.0 show good agreement with the experimental data.
KW - Flame structure
KW - Formic acid
KW - Hydrogen
KW - Laminar flame speed
KW - Molecular-beam mass spectrometry
UR - http://www.scopus.com/inward/record.url?scp=85089486104&partnerID=8YFLogxK
U2 - 10.1016/j.proci.2020.06.033
DO - 10.1016/j.proci.2020.06.033
M3 - Article
AN - SCOPUS:85089486104
VL - 38
SP - 2379
EP - 2386
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
SN - 1540-7489
IS - 2
ER -
ID: 25059178