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

Adrian Gunnarsson, Johan Simonsson, Daniel Bäckström, Manu Naduvil Mannazhi, Per Erik Bengtsson, Klas Andersson

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)


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.

Original languageEnglish
Pages (from-to)12288-12295
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Issue number36
Publication statusPublished - 2018

Subject classification (UKÄ)

  • Energy Engineering


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