Abstract
The conditions of combustion reactions determine the nature of combustion and its results. An uninterrupted operation of combustion devices is required to ensure a complete combustion of fuel by the influence of heat mass transfer and aerodynamics on the ongoing chemical reactions since power plants are the main sources of hazardous emissions. Therefore, the study of furnace process efficiency by means of mathematical modeling is getting more significant. This study allows to determine the dynamic performance of a power plant, to investigate the effectiveness of security measures, the use of combined fuels and low-emission burners. Based on the review of works on the research topic, it can be concluded that the study of furnace processes requires the use of CFD modeling. The article considers a mathematical model and methodology for the numerical study of the methane-air mixture combustion in STAR-CCM+, and describes the choice of mesh and combustion model. The results of numerical study with the influence of recirculation degree changing the ratio of combustion gas from 0 to 15% to reduce the hazardous emissions are presented. Based on the results of simulation, a technical solution was developed to improve the effectiveness of fuel combustion in power plants, and its scheme is presented. The article is intended for graduate and doctoral students interested in numerical study and development of methods for suppressing the formation of thermal nitrogen oxides in the combustion products of boilers of thermal power plants.
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