可視化による直噴式ディーゼル機関の噴霧の燃焼特性に関する研究

概要

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The authors have examined in the past the influences of air swirl on the combustion performances of D. I. type diesel engines and shown various factors which affect the optimum swirl intensity. In the present studies, the authors have rebuilt the engine used in the above experiment to take high-speed photos from the lower part of the combustion chamber, and examined the correlations between fuel spray dispersion and combustion characteristics with the aid of photographic visualization. Comparing the visualized data with the results of operation tests, it has been verified that the utilization of air by the fuel spray can be evaluated geometrically by the extent to which fuel spray is dispersed by the swirl during the fuel injection in the case of shallow bowl type combustion chamber. The effects of the combustion chamber shape and injection pressure on the formation and oxidization of the soot have been also clarified.
社団法人日本機械学会の論文
1989-01-25