The dynamic parameters influencing soot formation and destruction in droplet burning are studied through time-resolved photography and sampling. Results show that the instantaneous amount of soot present is proportional to the instantaneous flame size, that near-complete oxidation of soot can be achieved by confining it within the regressing, closed flame, and that weak convection promotes soot oxidation while early extinction can lead to substantial soot emission. The effects of blending a sooty component with a non-sooty component of different relative volatilities have also been investigated. A major disadvantage with the operation of direct injection internal combustion engines is the substantial amount of soot emission involved. This problem is expected to become more serious in the future due to the anticipated increase in engine compression ratios to improve efficiency, and the utilization of synthetic fuels which are rich in aromatics.
|Western States Section, Combustion Institute (Paper)
|Published - 1984
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