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This paper studies how the inner swirl angle affects the flame stability of a double-swirl burner with biogas-methane co-firing. Biogas is a renewable fuel that is produced from organic waste by anaer...obic digestion, it can be mixed with methane as an act to save methane fuel as well reduce CO_2 emissions. However, biogas has combustion challenges due to its high CO_2 content. The double-swirl burner is a technology that can improve combustion performance and reduce nitrogen oxide emissions. This study investigates different inner swirl angles with various CO_2 fractions in biogas and assesses their effects on flame stability and flame appearance. The paper finds that a higher CO_2 fraction and inner swirl angle make the flame less stable and requires more fuel, and also changes the flame shape. The paper gives insights into improving the double-swirl burner for biogas-methane co-firing.続きを見る
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