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2D effects in laminar premixed flames stabilized on a flat flame burner

Konnov, Alexander LU ; Riemeijer, R.; Kornilov, V. N. and de Goey, L. P. H. (2013) In Experimental Thermal and Fluid Science 47. p.213-223
Abstract
In the present work non-idealities of flat burner-stabilized flames at atmospheric and low pressures are examined using PIV measurements, which are supported by and analyzed with the help of CFD modeling. Radial and axial velocity profiles measured in the cold flow and in the flames at atmospheric and at lower pressures are presented. Two possible reasons for the drop in the apparent laminar burning velocity at low pressures (below 20 kPa) were considered: the non-uniformity of the velocity profile issuing from the burner mouth and diffusion of the gas mixture from the original gas flow. At very low pressures an outward velocity at the edge of the burner plate is detected. A part of the fuel-air mixture therefore seems to escape the flow... (More)
In the present work non-idealities of flat burner-stabilized flames at atmospheric and low pressures are examined using PIV measurements, which are supported by and analyzed with the help of CFD modeling. Radial and axial velocity profiles measured in the cold flow and in the flames at atmospheric and at lower pressures are presented. Two possible reasons for the drop in the apparent laminar burning velocity at low pressures (below 20 kPa) were considered: the non-uniformity of the velocity profile issuing from the burner mouth and diffusion of the gas mixture from the original gas flow. At very low pressures an outward velocity at the edge of the burner plate is detected. A part of the fuel-air mixture therefore seems to escape the flow at the edge of the burner. Further experiments, however, revealed that diffusion of the fuel from the fresh mixture and of the ambient atmosphere into the flame is less important as compared to the diffusive loss of H atoms from the flame at low pressures. This was substantiated by the numerical analysis and assessment of the earlier observations from the literature. A critical relation between the size of the burner and the lowest pressure for ensuring the stabilization of a flat flame is demonstrated. (C) 2013 Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Methane, Flat flame, PIV, Low pressure, Homogeneity
in
Experimental Thermal and Fluid Science
volume
47
pages
213 - 223
publisher
Elsevier
external identifiers
  • wos:000317450500023
  • scopus:84875367712
ISSN
1879-2286
DOI
10.1016/j.expthermflusci.2013.02.002
language
English
LU publication?
yes
id
12b65bdd-7b27-4d30-a286-dece6bfb1a51 (old id 3738975)
date added to LUP
2013-05-22 13:31:14
date last changed
2019-11-17 03:05:53
@article{12b65bdd-7b27-4d30-a286-dece6bfb1a51,
  abstract     = {In the present work non-idealities of flat burner-stabilized flames at atmospheric and low pressures are examined using PIV measurements, which are supported by and analyzed with the help of CFD modeling. Radial and axial velocity profiles measured in the cold flow and in the flames at atmospheric and at lower pressures are presented. Two possible reasons for the drop in the apparent laminar burning velocity at low pressures (below 20 kPa) were considered: the non-uniformity of the velocity profile issuing from the burner mouth and diffusion of the gas mixture from the original gas flow. At very low pressures an outward velocity at the edge of the burner plate is detected. A part of the fuel-air mixture therefore seems to escape the flow at the edge of the burner. Further experiments, however, revealed that diffusion of the fuel from the fresh mixture and of the ambient atmosphere into the flame is less important as compared to the diffusive loss of H atoms from the flame at low pressures. This was substantiated by the numerical analysis and assessment of the earlier observations from the literature. A critical relation between the size of the burner and the lowest pressure for ensuring the stabilization of a flat flame is demonstrated. (C) 2013 Elsevier Inc. All rights reserved.},
  author       = {Konnov, Alexander and Riemeijer, R. and Kornilov, V. N. and de Goey, L. P. H.},
  issn         = {1879-2286},
  keyword      = {Methane,Flat flame,PIV,Low pressure,Homogeneity},
  language     = {eng},
  pages        = {213--223},
  publisher    = {Elsevier},
  series       = {Experimental Thermal and Fluid Science},
  title        = {2D effects in laminar premixed flames stabilized on a flat flame burner},
  url          = {http://dx.doi.org/10.1016/j.expthermflusci.2013.02.002},
  volume       = {47},
  year         = {2013},
}