Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Revisit laminar premixed ethylene flames at elevated pressures: A mass spectrometric and laminar flame propagation study. / Ma, Siyuan; Zhang, Xiaoyuan; Dmitriev, Artёm и др.
в: Combustion and Flame, Том 230, 111422, 08.2021.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Revisit laminar premixed ethylene flames at elevated pressures: A mass spectrometric and laminar flame propagation study
AU - Ma, Siyuan
AU - Zhang, Xiaoyuan
AU - Dmitriev, Artёm
AU - Shmakov, Andrey
AU - Korobeinichev, Oleg
AU - Mei, Bowen
AU - Li, Yuyang
AU - Knyazkov, Denis
N1 - Funding Information: The authors are grateful for the funding support from National Key R&D Program of China (2017YFE0123100) and National Natural Science Foundation of China ( 91841301 , U1832171 ). This work has been also financially supported by the Ministry of Science and Higher Education of the Russian Federation , Project number No 075-15-2020-806 . Funding Information: The authors are grateful for the funding support from National Key R&D Program of China (2017YFE0123100) and National Natural Science Foundation of China (91841301, U1832171). The work is partially supported by the Grant of RF Government for Support of Scientific Research under the Direction of Leading Scientists No. 075-15-2019-1888. Publisher Copyright: © 2021 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/8
Y1 - 2021/8
N2 - This work reports investigations on laminar premixed ethylene (C2H4) flames with special interests on measurements and kinetic modeling at elevated pressures. Chemical structures of laminar premixed C2H4/O2/Ar flames at 3 and 5 atm with the equivalence ratio of 1.4 were measured with molecular beam mass spectrometry. Both the stable and reactive species were identified and quantified in this work. Among them, the mole fractions of H and OH are evidently dependent on pressures. Laminar flame propagation of C2H4/air mixtures at 1 and 2 atm and that of C2H4/O2/He mixtures at 2 and 5 atm were also investigated in a high pressure constant-volume cylindrical combustion vessel at an unburnt temperature (Tu) of 298 K and equivalence ratios of 0.7–1.5. Besides, a kinetic model for C2H4 combustion was developed based on the evaluations of critical reactions with special concerns on recent theoretical calculation progress and validated against both the new data in this work and previous data of ethylene combustion in literature. The updated reactions of C2H4 + O from recent theoretical calculations in the present model can improve the predictions of both the flame speciation results and the laminar burning velocities (LBVs) under rich and elevated pressure conditions. Compared with previous models, C2H4 + O = 3CH2 + CH2O instead of C2H4 + O = CH3 + HCO becomes a major consumption pathway of C2H4 in the present model. This results in the lower production of CH3 which is responsible for the chain termination under rich and elevated pressure conditions. Therefore, the present model could lower down the predictions of the CH3-related speciation data and improve the LBV predictions under rich and elevated pressure conditions.
AB - This work reports investigations on laminar premixed ethylene (C2H4) flames with special interests on measurements and kinetic modeling at elevated pressures. Chemical structures of laminar premixed C2H4/O2/Ar flames at 3 and 5 atm with the equivalence ratio of 1.4 were measured with molecular beam mass spectrometry. Both the stable and reactive species were identified and quantified in this work. Among them, the mole fractions of H and OH are evidently dependent on pressures. Laminar flame propagation of C2H4/air mixtures at 1 and 2 atm and that of C2H4/O2/He mixtures at 2 and 5 atm were also investigated in a high pressure constant-volume cylindrical combustion vessel at an unburnt temperature (Tu) of 298 K and equivalence ratios of 0.7–1.5. Besides, a kinetic model for C2H4 combustion was developed based on the evaluations of critical reactions with special concerns on recent theoretical calculation progress and validated against both the new data in this work and previous data of ethylene combustion in literature. The updated reactions of C2H4 + O from recent theoretical calculations in the present model can improve the predictions of both the flame speciation results and the laminar burning velocities (LBVs) under rich and elevated pressure conditions. Compared with previous models, C2H4 + O = 3CH2 + CH2O instead of C2H4 + O = CH3 + HCO becomes a major consumption pathway of C2H4 in the present model. This results in the lower production of CH3 which is responsible for the chain termination under rich and elevated pressure conditions. Therefore, the present model could lower down the predictions of the CH3-related speciation data and improve the LBV predictions under rich and elevated pressure conditions.
KW - Elevated pressure
KW - Ethylene
KW - Flame structure
KW - Kinetic model
KW - Laminar burning velocity
UR - http://www.scopus.com/inward/record.url?scp=85103623527&partnerID=8YFLogxK
U2 - 10.1016/j.combustflame.2021.111422
DO - 10.1016/j.combustflame.2021.111422
M3 - Article
AN - SCOPUS:85103623527
VL - 230
JO - Combustion and Flame
JF - Combustion and Flame
SN - 0010-2180
M1 - 111422
ER -
ID: 28318668