Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames DOI
Ping Wang, Zeyu Zhang,

Kang Cheng

и другие.

Physics of Fluids, Год журнала: 2024, Номер 36(12)

Опубликована: Дек. 1, 2024

As one of the most promising zero-carbon fuels, ammonia has attracted widespread attention. However, combustion faces problems such as high nitrogen oxide emissions. This work aims to investigate characteristics fuel gas mixture 60% NH3 and 40% CH4 by volume, under five different equivalence ratios, i.e., 0.7, 0.85, 1.0, 1.15, 1.3, respectively. Both large eddy simulation (LES) experimental test are conducted. The results reveal that flame temperature nitric (NO) emissions exhibit an initial increase, followed a decrease with rising ratios. Notably, highest is observed at ϕ = while peak NO emission found 0.85. ratio changes, variation turbulent flow fields mass recirculation rates not significant. On contrary, OH radicals distinct shifts in relation ratio. predicted LES agree well results. A chemical reaction network (CRN) analysis also conducted, which effectively predicts trends clarifies generation pathways key mechanisms. CRN highlights variations sensitivities crucial constituents, NH3, OH, NO,

Язык: Английский

Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames DOI
Ping Wang, Zeyu Zhang,

Kang Cheng

и другие.

Physics of Fluids, Год журнала: 2024, Номер 36(12)

Опубликована: Дек. 1, 2024

As one of the most promising zero-carbon fuels, ammonia has attracted widespread attention. However, combustion faces problems such as high nitrogen oxide emissions. This work aims to investigate characteristics fuel gas mixture 60% NH3 and 40% CH4 by volume, under five different equivalence ratios, i.e., 0.7, 0.85, 1.0, 1.15, 1.3, respectively. Both large eddy simulation (LES) experimental test are conducted. The results reveal that flame temperature nitric (NO) emissions exhibit an initial increase, followed a decrease with rising ratios. Notably, highest is observed at ϕ = while peak NO emission found 0.85. ratio changes, variation turbulent flow fields mass recirculation rates not significant. On contrary, OH radicals distinct shifts in relation ratio. predicted LES agree well results. A chemical reaction network (CRN) analysis also conducted, which effectively predicts trends clarifies generation pathways key mechanisms. CRN highlights variations sensitivities crucial constituents, NH3, OH, NO,

Язык: Английский

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