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Three-dimensional computation of heat transfer from flames between vertical parallel walls

Yan, Zhenghua LU and Holmstedt, Göran LU (1999) In Combustion and Flame 117(3). p.574-588
Abstract
The heat transfer from turbulent diffusion flames between vertical walls has been computed for different wall and burner configurations. The buoyancy-modified k- model was used to study the turbulent characteristics of the flow. The flamelet concept, coupled to a prescribed probability density function, was employed to model the nonpremixed combustion process. With the nucleation, surface growth, coagulation, and oxidation considered, sooting was modeled by solving the balance equations for mass fraction and number density. The radiation from the main radiating species - carbon dioxide, water vapor and soot - was calculated using the discrete transfer method. A recently developed fast, narrow-band model was adopted to provide the radiation... (More)
The heat transfer from turbulent diffusion flames between vertical walls has been computed for different wall and burner configurations. The buoyancy-modified k- model was used to study the turbulent characteristics of the flow. The flamelet concept, coupled to a prescribed probability density function, was employed to model the nonpremixed combustion process. With the nucleation, surface growth, coagulation, and oxidation considered, sooting was modeled by solving the balance equations for mass fraction and number density. The radiation from the main radiating species - carbon dioxide, water vapor and soot - was calculated using the discrete transfer method. A recently developed fast, narrow-band model was adopted to provide the radiation properties of the radiating species. Computations were performed for different cases by varying the wall separation and burner output. The results were analyzed and compared with experimental measurements, with which they showed good agreement. The effects of wall separation and burner output on heat transfer were faithfully reproduced. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Flame research, Buoyancy, Carbon dioxide, Combustion, Computational fluid dynamics, Diffusion in gases, Heat radiation, Mathematical models, Probability density function, Soot, Turbulent flow, Vapors, Wall flow
in
Combustion and Flame
volume
117
issue
3
pages
574 - 588
publisher
Elsevier
external identifiers
  • scopus:0033136977
ISSN
0010-2180
DOI
10.1016/S0010-2180(98)00092-3
language
English
LU publication?
yes
id
5b56ab0f-946b-4b92-81f6-11a42a91887e (old id 4468402)
date added to LUP
2014-06-18 16:04:32
date last changed
2017-01-01 07:06:28
@article{5b56ab0f-946b-4b92-81f6-11a42a91887e,
  abstract     = {The heat transfer from turbulent diffusion flames between vertical walls has been computed for different wall and burner configurations. The buoyancy-modified k- model was used to study the turbulent characteristics of the flow. The flamelet concept, coupled to a prescribed probability density function, was employed to model the nonpremixed combustion process. With the nucleation, surface growth, coagulation, and oxidation considered, sooting was modeled by solving the balance equations for mass fraction and number density. The radiation from the main radiating species - carbon dioxide, water vapor and soot - was calculated using the discrete transfer method. A recently developed fast, narrow-band model was adopted to provide the radiation properties of the radiating species. Computations were performed for different cases by varying the wall separation and burner output. The results were analyzed and compared with experimental measurements, with which they showed good agreement. The effects of wall separation and burner output on heat transfer were faithfully reproduced.},
  author       = {Yan, Zhenghua and Holmstedt, Göran},
  issn         = {0010-2180},
  keyword      = {Flame research,Buoyancy,Carbon dioxide,Combustion,Computational fluid dynamics,Diffusion in gases,Heat radiation,Mathematical models,Probability density function,Soot,Turbulent flow,Vapors,Wall flow},
  language     = {eng},
  number       = {3},
  pages        = {574--588},
  publisher    = {Elsevier},
  series       = {Combustion and Flame},
  title        = {Three-dimensional computation of heat transfer from flames between vertical parallel walls},
  url          = {http://dx.doi.org/10.1016/S0010-2180(98)00092-3},
  volume       = {117},
  year         = {1999},
}