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Investigation on Flame Characteristics of Oxy-Fuel Combustion

[+] Author Affiliations
Bidhan Dam, Md. Islam, Norman Love, Ahsan Choudhuri

The University of Texas at El Paso, El Paso, TX

Paper No. POWER2011-55041, pp. 1-5; 5 pages
doi:10.1115/POWER2011-55041
From:
  • ASME 2011 Power Conference collocated with JSME ICOPE 2011
  • ASME 2011 Power Conference, Volume 1
  • Denver, Colorado, USA, July 12–14, 2011
  • ISBN: 978-0-7918-4459-5
  • Copyright © 2011 by ASME

abstract

Oxy-fuel combustion is currently being considered as a technology that could substantially reduce NOx and CO2 emissions. Currently the gas turbine industry has begun to consider implementing oxy-fuels on a large scale in some combustors. In an effort to better understand and characterize the fundamental flame characteristics of oxy-fuel combustion this article presents the results of stability and flame length experiments. From the results, the flame length primarily depends on the percentage of oxygen and fuel firing input. Flames with a fuel firing input of 1313 W had a higher flame length (275 mm) compared to the same fuel at a firing rate of 925 W (240 mm). It was observed that as the percentage of oxygen increased, the length of the flames decreased for both firing rates. The stability maps of CH4 -O2 were plotted using six different tubular burner diameters, ranging from 1 to 6 mm. The flame from the 1 mm diameter burner tube tended to extinguish, even at lower mass flow rates due to a quenching effect. For larger burner diameters, 2 to 6 mm, the flames tended to flashback. It was also observed that the stability regime increased with an increase in CO2 concentration in the fuel mixtures.

Copyright © 2011 by ASME
Topics: Combustion , Fuels , Flames

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