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Flame turbulence interaction in lean premixed flame.

Carlsson, Henning (2010)
Department of Energy Sciences
Abstract
Some fundamental physical questions were highlighted through a literature study. The mathematical model for both the initiation of turbulence fields and for the DNS solver was shown. Initial turbulence fields were then formed by the different methods and a comparison between them was made. The comparison included differences in overall pattern through the use of different energy spectrum functions, which also was reviewed in detail. Flame-turbulence interaction for a lean hydrogen-air flame at different turbulence fields, by varying the turbulent intensity and integral length scale and thereby also the Reynolds and Karlovitz numbers, was studied in 2D and 3D through DNS. The phenomenon of preheat zone broadening by turbulent eddies, the... (More)
Some fundamental physical questions were highlighted through a literature study. The mathematical model for both the initiation of turbulence fields and for the DNS solver was shown. Initial turbulence fields were then formed by the different methods and a comparison between them was made. The comparison included differences in overall pattern through the use of different energy spectrum functions, which also was reviewed in detail. Flame-turbulence interaction for a lean hydrogen-air flame at different turbulence fields, by varying the turbulent intensity and integral length scale and thereby also the Reynolds and Karlovitz numbers, was studied in 2D and 3D through DNS. The phenomenon of preheat zone broadening by turbulent eddies, the distribution of species within the reaction zone and preheat zone, pressure effects on the reaction zone, eddy pair distortion of the flame front and 2D-3D simulation differences were observed qualitatively. Turbulent flame speed, flame induced turbulence and flame surface density was measured quantitatively through defining of the instantaneous flame surface position by the fuel distribution. Based on the used set up, an outlook towards future work was done. (Less)
Please use this url to cite or link to this publication:
author
Carlsson, Henning
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
Turbulent flame Combustion Premixed flame
report number
ISRN LUTMDN/TMHP--10/5218--SE
ISSN
0282-1990
language
English
id
1859147
date added to LUP
2011-03-29 13:48:55
date last changed
2011-03-29 13:48:55
@misc{1859147,
  abstract     = {Some fundamental physical questions were highlighted through a literature study. The mathematical model for both the initiation of turbulence fields and for the DNS solver was shown. Initial turbulence fields were then formed by the different methods and a comparison between them was made. The comparison included differences in overall pattern through the use of different energy spectrum functions, which also was reviewed in detail. Flame-turbulence interaction for a lean hydrogen-air flame at different turbulence fields, by varying the turbulent intensity and integral length scale and thereby also the Reynolds and Karlovitz numbers, was studied in 2D and 3D through DNS. The phenomenon of preheat zone broadening by turbulent eddies, the distribution of species within the reaction zone and preheat zone, pressure effects on the reaction zone, eddy pair distortion of the flame front and 2D-3D simulation differences were observed qualitatively. Turbulent flame speed, flame induced turbulence and flame surface density was measured quantitatively through defining of the instantaneous flame surface position by the fuel distribution. Based on the used set up, an outlook towards future work was done.},
  author       = {Carlsson, Henning},
  issn         = {0282-1990},
  keyword      = {Turbulent flame
Combustion
Premixed flame},
  language     = {eng},
  note         = {Student Paper},
  title        = {Flame turbulence interaction in lean premixed flame.},
  year         = {2010},
}