Abstract
An experimental study was made of soot emission by the combustion of a hydrocarbon droplet. A fuel droplet made at the tip of a fine quartz thread was ignited with a small pilot flame. The soot emission was collected on a glass-fiber filter paper and the mass of the soot was obtained by weighing the filter paper, before and after sampling of soot, with a microbalance. Soot sampled on a metal sheet mesh was photographed by an electron microscope to analyze the soot and its arrangement. The sooting ratio decreased with the increase of air velocity. A maximum value of the sooting ratio was observed with a variation of the air temperature. Electron microscope photographs showed that the size of soot particles also increased with air temperature. The sooting ratio increased with an increase of droplet diameter.
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