The oxygen-methane diffusion flame taking place in a gas turbine reactor was investigated experimentally with emphasis on flame stability. The oxidizer is a mixture of O2 and CO2 and the oxy-combustion process was studied at different equivalence ratios ranging from Φ = 0.5 to 1.0 and different O2/CO2 mixture composition (100/0, 80/20, 60/40, 50/50, 40/60, 30/70 and 25/75). The flame blowout condition was achieved through the reduction of oxygen percentage in the oxidizer mixture. Measurements were obtained for the flue gas temperature and concentration as well as flame visualization. It was found that the flame is very stable at the equivalence ratio of 0.65. At this ratio, the flame blows out at an O2/CO2 blending ratio of 22/78 for the case of fuel flow rate of 6 L/min and at a blending ratio of 21/79 for the case of fuel flow rate of 9 L/min. Attempts for operating the burner with less than 21% O2 were unsuccessful at all ranges of the operating parameters and resulted in unstable operation and blowout. Moreover, it was observed that the stabilization behavior did not change significantly with the variation of the fuel volume flow rate. It was also found that both flame and flue gas temperatures are reduced with the increase of the equivalence ratio.
Bibliographical noteFunding Information:
The authors would like to acknowledge the support provided by King Fahd University of Petroleum and Minerals through the project No. 09-ENE755-04 . The authors would also like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM) and for funding this work through Project no. 13-ENE1961-04 as part of the National Science, Technology and Innovation Plan .
© 2015 Elsevier Ltd.
- Flame stabilization
- Gas turbine model combustor
- Swirl stabilized flames
ASJC Scopus subject areas
- Mechanical Engineering
- Energy Engineering and Power Technology
- Energy (all)
- Electrical and Electronic Engineering
- Management, Monitoring, Policy and Law
- Industrial and Manufacturing Engineering
- Building and Construction
- Fuel Technology
- Renewable Energy, Sustainability and the Environment
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