Assessment of Pollutant Emissions and Combustion Efficiency due to Inserting Aerodynamic Solid Body in High-Temperature Flame Regions

This study evaluates a method of using a solid body with a special aerodynamic shape to redistribute the burner's peak temperature region in the flame. This method extends the low-temperature range and suppresses thermal nitric oxide formation by numerical simulation. The model used for this purpose is a 7-fin fan blade with a bluff body for generating the wake region downstream of the cylindrical combustion chamber. The results are validated using the static temperature reported in the published paper for the burner without inserting a solid body in the flame region. There was a good agreement between experimental data and those calculated by applying the model for industrial application. The results cover the fin blades’ axial distance and fins' axial length parameters in the wake region. Also, the right fins’ axial distance and axial length in the downstream combustion flow were calculated by extracting the maximum axial length of the wake region. The burner's efficiency improved by 2.5% when installing a solid body burner. Moreover, NOx emission was investigated for 130 cases of numerical models related to the fins' axial length and axial distance parameters. The results indicated a decrease of 33.6% in NOx parts per million value, which was calculated for the selected inserting solid body burner in the flame region.