【作者】

Hiroshi Okada，Choei Sugawara

【摘要】

论文已在上海2013年CIMAC大会上发表，论文版权归CIMAC所有。 Up to this time, there have been studied about the size, the shape and the concentration of soot particles. While, in here, there was paying attention to the size of crystallites in a single soot particle, and for obtaining that it was to compare and to examine the size, which was measured through the diffraction of soot particles with an x-ray diffract meter, with the size observed by electron-microphotographs of soot particles. For this researching, the combustion device for single spray with a rapid-compression machine of single stroke, was tried to manufacture in the way to make the combustion state approaching that in the combustion chamber of diesel engines as closely as possible. The combustion apparatus of rapid-compression machine was set the glass window in its cylinder head for being able to observe the burning states from the outside, so that they could be taken photographs while with variation in compression ratio as possible, and it was also the purpose of this researching for what about the size particle while with variation in compression ratio and fuel quantity of one injection. Kerosene and gas oil were used with this experiment. The results of this experiment are summarized as follows;(1) The size distribution of single soot particles is not effected by the compression ratio and the quantity of fuel injection. It is the same as the distribution of single soot particle in the wick flame. (2)A single soot particle is a sphere of 300 angstrom in diameter in the maxi-mum distribution. (3) The size of crystallites in a single soot particle is 13.96 angstrom. It is 1/15~1/25 the size of a single soot particle in the maximum distribution obtained from the electron-microphotographs. (4) The size distribution of single soot particles in this experiment shows much the same tendency as the one caluculated by Guinier plot method. The results of this experiments indicate that a soot is composed of many spherical single soot particles and that it is formed by a great many microscopic cristallites. As described above, the essential structure of soot particles is one of the important factors in the investigation of soot formation and reduction in combustion processe

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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