A Study on Ignition Process of Diesel Sprays

概要

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The main theme of this study is to reveal the characteristics of the fuel-air mixture that is responsible for ignition of diesel sprays. For this purpose, the ignition process of a spray was studied under diesel-like conditions realized by a rapid compression machine. The fuel-air mixture before ignition was chemically analyzed by a total gas sampling method. The condition to which fuel was subjected was estimated by combining the information on the mixture composition with pressure-time curves and photographs of sprays. The results show that the mixture before ignition has considerably higher temperature than the surrounding air. Oxidation begins very early in the ignition delay period, which supplies heat to the spray and causes cracking and gasification of fuel. It is assumed that the accumulated gas begins to release a large amount of heat triggered by the oxidation of a relatively small-scale mixture.
一般社団法人日本機械学会の論文
1995-08-15