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Radiative Heat Transfer Modeling and in Situ Diagnostics of Soot in an 80 kWth Propane Flame with Varying Feed-Gas Oxygen Concentration

Gunnarsson, Adrian ; Simonsson, Johan LU ; Bäckström, Daniel ; Mannazhi, Manu Naduvil LU ; Bengtsson, Per Erik LU and Andersson, Klas (2018) In Industrial and Engineering Chemistry Research 57(36). p.12288-12295
Abstract

This work presents experimental measurements of various 80 kWth propane flames, using a swirl burner, and modeling of the radiative heat transfer. The combustion conditions were altered by varying the oxygen concentration in the oxidant within range of 21-32%, while keeping the thermal input and oxygen-to-fuel ratio constant. Temperature, gas composition, and radiative intensity were measured using probes, while the soot volume fraction was quantified using nonintrusive laser-induced incandescence. The radiative intensity and the soot volume fraction increased with an increased oxygen concentration in the flame. When the oxygen concentration exceeded 27% the soot volume fraction was increased more than 14-fold. The results... (More)

This work presents experimental measurements of various 80 kWth propane flames, using a swirl burner, and modeling of the radiative heat transfer. The combustion conditions were altered by varying the oxygen concentration in the oxidant within range of 21-32%, while keeping the thermal input and oxygen-to-fuel ratio constant. Temperature, gas composition, and radiative intensity were measured using probes, while the soot volume fraction was quantified using nonintrusive laser-induced incandescence. The radiative intensity and the soot volume fraction increased with an increased oxygen concentration in the flame. When the oxygen concentration exceeded 27% the soot volume fraction was increased more than 14-fold. The results reveal the potential of promoting radiative heat transfer by increasing the oxygen concentration; the total radiative intensity becomes dominated by the soot particle contribution. In addition, laser-induced incandescence was successfully used for instantaneous and spatially resolved soot measurements in this type of furnace being at a technical scale.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial and Engineering Chemistry Research
volume
57
issue
36
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85052896837
ISSN
0888-5885
DOI
10.1021/acs.iecr.8b02699
language
English
LU publication?
yes
id
e1e4a910-f986-40ed-a8ca-9d88645d33c5
date added to LUP
2018-10-11 10:50:22
date last changed
2020-03-11 07:39:20
@article{e1e4a910-f986-40ed-a8ca-9d88645d33c5,
  abstract     = {<p>This work presents experimental measurements of various 80 kW<sub>th</sub> propane flames, using a swirl burner, and modeling of the radiative heat transfer. The combustion conditions were altered by varying the oxygen concentration in the oxidant within range of 21-32%, while keeping the thermal input and oxygen-to-fuel ratio constant. Temperature, gas composition, and radiative intensity were measured using probes, while the soot volume fraction was quantified using nonintrusive laser-induced incandescence. The radiative intensity and the soot volume fraction increased with an increased oxygen concentration in the flame. When the oxygen concentration exceeded 27% the soot volume fraction was increased more than 14-fold. The results reveal the potential of promoting radiative heat transfer by increasing the oxygen concentration; the total radiative intensity becomes dominated by the soot particle contribution. In addition, laser-induced incandescence was successfully used for instantaneous and spatially resolved soot measurements in this type of furnace being at a technical scale.</p>},
  author       = {Gunnarsson, Adrian and Simonsson, Johan and Bäckström, Daniel and Mannazhi, Manu Naduvil and Bengtsson, Per Erik and Andersson, Klas},
  issn         = {0888-5885},
  language     = {eng},
  number       = {36},
  pages        = {12288--12295},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Industrial and Engineering Chemistry Research},
  title        = {Radiative Heat Transfer Modeling and in Situ Diagnostics of Soot in an 80 kW<sub>th</sub> Propane Flame with Varying Feed-Gas Oxygen Concentration},
  url          = {http://dx.doi.org/10.1021/acs.iecr.8b02699},
  doi          = {10.1021/acs.iecr.8b02699},
  volume       = {57},
  year         = {2018},
}