Abstract
Abstract Characteristics of soot formation and burn out processes during combustion of liquid fuels have been presented. Turbulent diffusion flames of heavy fuel oil and its water-emulsion with 10% water were tested. These fuels were equivalent with respect to their thermal parameters in the combustion chamber. Combustion tests were carried out in a large laboratory-scale furnace reproducing practical combustion conditions Samples of soot were collected by a suction probe with water injection. The post-extraction (soxhlet apparatus) carbonaceous residue was classified as soot. It occurred in two forms: -as individual particles usually joined in simple, short chains, -as branched clusters of these chains Soot formation was dominant in the region 0.2-0.4 m from the burner nozzle (the high-temperature combustion zone), slightly shifted from the flame axis, while soot particles growth was fastest strictly at the axis. At a distance over 0.5 m from the burner, soot oxidation predominated. During combustion the...
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