Effect of oxy-colorless distributed combustion of methane flame behaviour in a premixed gas turbine burner

Year 2023, Volume: 8 Issue: 3, 465 - 476, 22.09.2023

Buğrahan Alabaş Zeliha Türkkahraman

https://doi.org/10.58559/ijes.1344171

Abstract

NOX emissions and flame characteristics in gas turbine burners are a current issue. Different combustion methods are tested for the solution of NOX emissions. One of these methods is oxy-colorless distributed combustion. In this method, CO2 is used as a diluent instead of N2 gas in the air. In this way, nitrogen does not enter the combustion chamber and theoretically NOX emissions are planned to be zero. In this study, a premixed and swirl assisted gas turbine combustion chamber used experimentally was verified numerically. Analyzes were carried out by keeping 3 kW thermal power, 1 swirl ratio and 0.7 equivalence ratios constant. The oxy-colorless distributed combustion method was applied to the pure methane flame at different O2/CO2 ratios. Analyzes were carried out with the O2 ratio of 26%, 21%, 19%, 17% and 15% by volume. The results showed that the colorless distributed combustion conditions were achieved as the CO2 ratio increased. Thanks to the oxy-colorless distributed combustion method, almost zero NOX emissions have been achieved. In addition, as the O2 ratio in the oxidizer mixture decreased, a significant decrease in the flame temperature was detected. Thanks to this study, the effect of oxy-colorless distributed combustion conditions in a premixed and swirl supported combustion chamber was investigated.

Keywords

Methane, Oxy-colorless distributed combustion, Flame temperature

References

• [1] Karyeyen S, Feser JS, Gupta AK. Hydrogen concentration effects on swirl-stabilized oxy-colorless distributed combustion. Fuel 2019; 253: 772-780.
• [2] Khalil AEE, Gupta AK.The role of CO2 on oxy-colorless distributed combustion. Applied Energy 2017; 188: 466-474.
• [3] Tu Y, Liu H, Su K, Chen S, Liu Z, Zheng C, Li W. Numerical study of H2O addition effects on pulverized coal oxy-MILD combustion. Fuel Processing Technology 2015; 138: 252-262.
• [4] Perrone D, Castiglione T, Klimanek A, Morrone P, Amelio M. Numerical simulations on Oxy-MILD combustion of pulverized coal in an industrial boiler. Fuel Processing Technology 2018; 181: 361-374.
• [5] llbas M, Guler NU, Sahin M. Experimental and numerical investigation of biogas distributed combustion with different oxidizers in a swirl stabilized combustor. Fuel 2021; 304: 121452.
• [6] Khalil AEE, Gupta AK. Flame fluctuations in Oxy-CO2-methane mixtures in swirl assisted distributed combustion. Applied Energy 2017; 204: 303-317.
• [7] Kekeç KB, Karyeyen S. H2 – CH4 blending fuels combustion using a cyclonic burner on colorless distributed combustion. International Journal of Hydrogen Energy 2022; 47(24): 12393-12409.
• [8] Yılmaz H. Assessment of Combustion and Emission Characteristics of Various Gas Mixtures under Different Combustion Techniques. International Journal of Energy Studies 2020; 5(1): 13-41.
• [9] Karyeyen S, Ilbas M. Application of distributed combustion technique to hydrogen-rich coal gases: A numerical investigation. International Journal of Hydrogen Energy 2019; 45(5): 3641-3650.
• [10] Fordoei EE, Mazaheri K, Mohammadpour A. Numerical study on the heat transfer characteristics, flame structure, and pollutants emission in the MILD methane-air, oxygen-enriched and oxy-methane combustion, Energy 2021; 218: 119524.
• [11] Ilbas M, Kumuk O, Karyeyen S. Modelling of the gas-turbine colorless distributed combustion: An application to hydrogen enriched – kerosene fuel. International Journal of Hydrogen Energy 2022; 47(24): 12354-12364.
• [12] Alabaş HA, Çeper BA. Effect of the hydrogen/kerosene blend on the combustion characteristics and pollutant emissions in a mini jet engine under CDC conditions. International Journal of Hydrogen Energy 2023 (In Press).
• [13] Alabaş B, Tunç G, Taştan M, Yılmaz İ. Experimental investigation of the emission behaviour and flame stability of the oxygen and hydrogen enriched methane under acoustic enforcement. Fuel 2021; 290: 120047.
• [14] Alabaş B, Altınay A. Equivalence Ratio Effect on Helium Diluted Methane Jet Flame Temperature and Pollutant Emission for a Swirl Assisted Gas Turbine Burner. Journal of Aeronautics and Space Technologies 2023; 16(1): 50-63.
• [15] Tao C, Zhou H. Dilution effects of CO2, Ar, N2 and He microjets on the combustion dynamic and emission characteristics of unsteady premixed flame. Aerospace Science and Technology 2021; 111: 106537.
• [16] Wei H, Xu Z, Zhou L, Zhao J, Yu J. Effect of hydrogen-air mixture diluted with argon/nitrogen/carbon dioxide on combustion processes in confined space. International Journal Hydrogen Energy 2018; 43(31): 14798-14805.