Effects of the Dimensionless Light Extinction Coefficient on Soot Particles Concentration for Different Coal Combustion Conditions

Abstract

This study investigated the effect of the dimensionless light extinction coefficient on soot particles concentration for different combustion conditions of bituminous coal. The combustion pressures and burning temperatures were set between 0.1 MPa and 0.3 MPa, and 550 ℃ to 650 ℃, respectively. The dimensionless light extinction coefficient was experimentally measured and the soot particles concentration was calculated using the full-field extinction method and Abel deconvolution technique. The results of this study showed that the dimensionless light extinction coefficient increased with increasing burning temperature under constant pressure. Further, when the burning temperature was constant, the dimensionless light extinction coefficient also increased. In addition, the soot particles concentration increased as the flame height increased, and changed by about 15% as a function of the dimensionless light extinction coefficient at the same flame height.