#6593. Experimental and statistical ANOVA analysis on combustion stability of CH4/O2/CO2in a partially premixed gas turbine combustor

November 2026publication date
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Journal’s subject area:
Energy (all);
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Abstract:
The application of the oxy-fuel combustion technique could tackle the combustion processs environmental issues. Experiments were conducted on partially premixed air- and oxy-methane combustion flames stabilized over a novel perforated burner in the present work. The burner has a premixing ratio of 7.0. In oxy-fuel combustion, the experiments were performed at oxygen fractions (OF%: volumetric percentage of O2 in the oxidizer mixture) of 29%, 32%, and 36% and over a range of operating conditions necessary for a stable flame. The results of oxy-combustion flames were compared with the corresponding air-combustion flames at the same operating conditions. Two sets of statistical analyses were performed for further confirmation of the experimental results. The first set investigated the operating parameters effect, including OF and oxidizer Reynolds number (Re), on the upper flammability limits (UFL). Simultaneously, the second set studied the impact of OF and equivalence ratio on flame length.
Keywords:
air emissions from fossil fuel combustion; ANOVA analysis; energy conversion/systems; flammability limits; heat energy generation/storage/transfer; natural gas technology; oxy-combustion; regression analysis; visual flame length

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