Abstract

The paper presents simulation of the atmospheric combustion of biogas. The biogas can be used in closed cycle gas turbine systems. The simulation, performed in ANSYS numerical codes, considered the following assumptions: air pre-heating above 800 K; CH4 concentration between 50% - 80%; different air primary, secondary and dilution ratios. The simulation returned results regarding: the combustion temperature field, the flame OH concentration field, the exhaust gases composition fields, the gases velocity field, the gases pressure field. The simulation showed the influence of the air pre-heating temperature upon the atmospheric combustion spatial features.

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