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Characterization of biogas-syngas turbulent combustion under moderate or intense low-oxygen dilution conditions
Author(s): oussama benbouaziz, A. Mameri, HADEF Amar, Z. Aouachria
Keywords: Biofuels, Chemical Mechanism, MILD Combustion, Turbulent Non-premixed Combustion
Moderate or Intense Low–oxygen Diluted (MILD) combustion is a promising technology with important properties such as zero emission and high efficiency. The biogas-syngas mixture is also considered as a promising new renewable biofuel with low emissions. The objective of this work is to examine effects of several parameters on the flame structure and emissions of biogas-syngas fuel under MILD conditions in JHC (Jet in Hot Co flow) burner. The modified standard k-ε model is adopted for turbulence modeling and the eddy dissipation concept (EDC) model is used with three detailed reaction mechanisms, namely: GRI-Mech 3.0, GRI-Mech 2.11, and DRM 2.11. Effects of biogas/syngas composition, temperature and oxygen concentration in the hot coflow and Reynolds number of the fuel jet have been elucidated. Results show that flame structure is more sensitive to the increase of hydrogen in syngas than that of methane in biogas. Increase of temperature and oxygen concentration in the co-flow stream leads to more NO formation whereas Reynolds number augmentation reduced them. Furthermore, NO species production is globally governed by NNH route.

Journal of Applied Fluid Mechanics

The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating.