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Numerical modelling of swirling diffusive flames

Parra-Santos, Teresa; Perez, Ruben; Szasz, Robert Z. LU ; Gutkowski, Artur N. and Castro-Ruiz, Francisco (2016) In EPJ Web of Conferences 114.
Abstract

Computational Fluid Dynamics has been used to study the mixing and combustion of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model solves 3D transient Navier Stokes for turbulent and reactive flows. Averaged velocity profiles using RNG swirl dominated k-epsilon model have been validated with experimental measurements from other sources for the non reactive case. The combustion model is Probability Density Function. Bearing in mind the annular jet has swirl number over 0.5, a vortex breakdown appears in the axis of the burner. Besides, the sudden expansion with a ratio of 2 in diameter between nozzle exits and the test chamber produces the boundary layer separation... (More)

Computational Fluid Dynamics has been used to study the mixing and combustion of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model solves 3D transient Navier Stokes for turbulent and reactive flows. Averaged velocity profiles using RNG swirl dominated k-epsilon model have been validated with experimental measurements from other sources for the non reactive case. The combustion model is Probability Density Function. Bearing in mind the annular jet has swirl number over 0.5, a vortex breakdown appears in the axis of the burner. Besides, the sudden expansion with a ratio of 2 in diameter between nozzle exits and the test chamber produces the boundary layer separation with the corresponding torus shape recirculation. Contrasting the mixing and combustion models, the last one produces the reduction of the vortex breakdown.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
EPJ Web of Conferences
volume
114
publisher
EDP Sciences
external identifiers
  • scopus:84974815967
ISSN
2101-6275
DOI
10.1051/epjconf/201611402087
language
English
LU publication?
yes
id
d7ae5dbf-b8e0-4f5e-a6dc-571339686f3c
date added to LUP
2017-02-09 08:59:12
date last changed
2017-05-02 15:33:59
@article{d7ae5dbf-b8e0-4f5e-a6dc-571339686f3c,
  abstract     = {<p>Computational Fluid Dynamics has been used to study the mixing and combustion of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model solves 3D transient Navier Stokes for turbulent and reactive flows. Averaged velocity profiles using RNG swirl dominated k-epsilon model have been validated with experimental measurements from other sources for the non reactive case. The combustion model is Probability Density Function. Bearing in mind the annular jet has swirl number over 0.5, a vortex breakdown appears in the axis of the burner. Besides, the sudden expansion with a ratio of 2 in diameter between nozzle exits and the test chamber produces the boundary layer separation with the corresponding torus shape recirculation. Contrasting the mixing and combustion models, the last one produces the reduction of the vortex breakdown.</p>},
  articleno    = {02087},
  author       = {Parra-Santos, Teresa and Perez, Ruben and Szasz, Robert Z. and Gutkowski, Artur N. and Castro-Ruiz, Francisco},
  issn         = {2101-6275},
  language     = {eng},
  month        = {03},
  publisher    = {EDP Sciences},
  series       = {EPJ Web of Conferences},
  title        = {Numerical modelling of swirling diffusive flames},
  url          = {http://dx.doi.org/10.1051/epjconf/201611402087},
  volume       = {114},
  year         = {2016},
}