1983-02-01

Distribution of Fuel Droplets, Hydrocarbon and Soot in Diesel Combustion Chamber 830456

Distribution of injected fuel droplets, total hydrocarbon concentration and soot concentration in the combustion chamber of a diesel engine with a swirl chamber have been measured microscopically with regard to the time and the space by means of optical method. As a result of this study, effect of the swirl flow on atomized droplet distribution, relation between the droplets and hydrocarbon concentration, and relation between the change in concentration gradient of hydrocarbon with the time and the velocity of the swirl flow, and effect of non-luminous flame on the time of heat release rate raising period have been obtained. And from spatial distributions of hydrocarbon concentration, soot concentration, and local temperature in the combustion chamber at each time, the locational characteristics of soot generation are clarified. Further, effects of hydrocarbon and local temperature on soot generation have been considered.

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