Equivalence Ratio Effect on Helium Diluted Methane Jet Flame Temperature and Pollutant Emission for a Swirl Assisted Gas Turbine Burner


  • Buğrahan Alabaş Erciyes Üniversitesi
  • Adem Altınay


Gas Turbine Burner, Methane, Helium, Pollutant Emissons


Temperature distribution and post-combustion emissions in gas turbine combustion chambers have attracted the attention of researchers in recent years. In this study, the combustion chamber temperature distribution and flue gas emission values ​​at different equivalence ratios were determined by diluting the methane flame with Helium at the rate of 20% by volume. A high swirl number (1.6) swirl generator was placed at the burner outlet and the combustor power was kept constant at 3 kW. In this way, the equivalence effect in a swirled combustion was investigated. The following results emerged in the study, in which 0.7, 0.8, 0.9, 1.0, 1.1 values ​​were tested as the equivalence ratio. With the increase in the equivalence ratio, the flame temperature and brightness at the burner outlet increased, especially up to 0.9 equivalence ratio. After this critical value, there was a tendency to decrease in temperature and luminous intensity again. As the distance from the burner axially in the combustion chamber increased, the average temperatures increased with the increase in the equivalence ratio. On the other hand, as the CO value in flue gas emissions was increased from 0.7 to 1.0 equivalence ratio, it decreased by half.


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How to Cite

B. Alabaş and A. Altınay, “Equivalence Ratio Effect on Helium Diluted Methane Jet Flame Temperature and Pollutant Emission for a Swirl Assisted Gas Turbine Burner”, JAST, vol. 16, no. 1, pp. 50–63, Jan. 2023.