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Soot formation and oxidation process in a DI diesel engine by use of LII/LIS technique
Published July 13, 1999 by Society of Automotive Engineers of Japan in Japan
Soot formation and oxidation in a direct-injection (DI) diesel combustion has been investigated using the simultaneous measurement of laser-induced incandescence (LII) and laser- induced scattering (LIS), two-color method, and cross-correlation velocimetry. Measurements were carried out in a small-sized, high-speed DI diesel engine with optical access view. The relative soot diameter and its number density were derived from LII/LIS images. The correlation between soot temperature and relative soot density (KL factor) was investigated by use of two- color method and cross-correlation velocimetry. In addition, the results of the authors'' previous study on the natural emission of OH radical were combined with the data obtained by the present study.