Influence of gas expansion on the propagation of a premixed flame in a spatially periodic shear flow
Abstract
It has been previously demonstrated that thermal gas expansion might have a role in boundary layer flashback of premixed turbulent flames, inducing local flow-reversal in the boundary layer's low-velocity streaks on the reactants’ side of the flame and facilitating its upstream propagation. Here, we perform a two-dimensional numerical investigation of the interaction between a periodic shear flow and a laminar premixed flame. The periodic shear is a simplified model for the oncoming prolonged streamwise velocity streaks with alternating regions of high and low velocities found in turbulent boundary layers in the vicinity of the walls. The parametric study focuses on the amplitude and wavelength of the periodic shear flow and on the gas expansion ratio (unburnt-to-burnt density ratio). With the increase of the amplitudes of the periodic shear flow and of the gas expansion, the curved flame velocity increases monotonically. The flame velocity dependence on the periodic shear wavelength is non-monotonic, which is consistent with previous theoretical studies of curved premixed flame velocity. The flame shape that is initially formed by the oncoming periodic shear appears to be metastable. At a later stage of the flame propagation, the flame shape transforms into the stationary one dominated by the Darrieus-Landau instability.
- Authors:
-
- Tsinghua Univ., Beijing (China)
- SINTEF Energy Research, Trondheim (Norway)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Tsinghua Univ., Beijing (China); Umea Univ. (Sweden)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); Stiftelsen Lars Hiertas Minne
- OSTI Identifier:
- 1828032
- Alternate Identifier(s):
- OSTI ID: 1775654
- Report Number(s):
- SAND-2018-1281J
Journal ID: ISSN 0010-2180; 672193
- Grant/Contract Number:
- NA0003525; 51750110503; F02015-0916
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Combustion and Flame
- Additional Journal Information:
- Journal Volume: 227; Journal ID: ISSN 0010-2180
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; Premixed flame; Flashback; Darrieus-Landau instability
Citation Formats
Feng, Ruixue, Gruber, Andrea, Chen, Jacqueline H., and Valiev, Damir M. Influence of gas expansion on the propagation of a premixed flame in a spatially periodic shear flow. United States: N. p., 2021.
Web. doi:10.1016/j.combustflame.2021.01.025.
Feng, Ruixue, Gruber, Andrea, Chen, Jacqueline H., & Valiev, Damir M. Influence of gas expansion on the propagation of a premixed flame in a spatially periodic shear flow. United States. https://doi.org/10.1016/j.combustflame.2021.01.025
Feng, Ruixue, Gruber, Andrea, Chen, Jacqueline H., and Valiev, Damir M. Wed .
"Influence of gas expansion on the propagation of a premixed flame in a spatially periodic shear flow". United States. https://doi.org/10.1016/j.combustflame.2021.01.025. https://www.osti.gov/servlets/purl/1828032.
@article{osti_1828032,
title = {Influence of gas expansion on the propagation of a premixed flame in a spatially periodic shear flow},
author = {Feng, Ruixue and Gruber, Andrea and Chen, Jacqueline H. and Valiev, Damir M.},
abstractNote = {It has been previously demonstrated that thermal gas expansion might have a role in boundary layer flashback of premixed turbulent flames, inducing local flow-reversal in the boundary layer's low-velocity streaks on the reactants’ side of the flame and facilitating its upstream propagation. Here, we perform a two-dimensional numerical investigation of the interaction between a periodic shear flow and a laminar premixed flame. The periodic shear is a simplified model for the oncoming prolonged streamwise velocity streaks with alternating regions of high and low velocities found in turbulent boundary layers in the vicinity of the walls. The parametric study focuses on the amplitude and wavelength of the periodic shear flow and on the gas expansion ratio (unburnt-to-burnt density ratio). With the increase of the amplitudes of the periodic shear flow and of the gas expansion, the curved flame velocity increases monotonically. The flame velocity dependence on the periodic shear wavelength is non-monotonic, which is consistent with previous theoretical studies of curved premixed flame velocity. The flame shape that is initially formed by the oncoming periodic shear appears to be metastable. At a later stage of the flame propagation, the flame shape transforms into the stationary one dominated by the Darrieus-Landau instability.},
doi = {10.1016/j.combustflame.2021.01.025},
journal = {Combustion and Flame},
number = ,
volume = 227,
place = {United States},
year = {Wed Jan 27 00:00:00 EST 2021},
month = {Wed Jan 27 00:00:00 EST 2021}
}
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