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Photographic and Three Dimensional Numerical Studies of Diesel Soot Formation Process
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1990 by SAE International in United States
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Soot formation process was examined by high speed photographs, using a single cumbustion diesel engine with a transparent swirl chamber. Fuel-air mixture and flames, and soot clouds were visualized by the schlieren method and the back-illuminated method, respectively. A three dimensional simulation program with soot formation and oxidation models was developed to clarify diesel soot formation processes. The models consist of several models previously proposed and partly improved in this study. Good agreement was obtained between calculated and experimental results. The following points were clarified through observation and numerical studies: (1) The main soot area is considerably smaller than luminous flame area, especially in the initial soot formation process. (2) The main soot cloud first appears in the tip region of fuel-air mixture, downstream of ignition position a few submilliseconds after the ignition. It is the soot carried down from the ignition position by a gas flow. (3) Temperature is more influential in soot formation, rather than fuel vapor concentration.
|Journal Article||Two-Color Diffused Back-Illumination Imaging as a Diagnostic for Time-Resolved Soot Measurements in Reacting Sprays|
|Journal Article||Soot Oxidation in Periphery of Diesel Spray Flame via High-Speed Sampling and HR-TEM Observation|
- Kiyomi Nakakita - Toyota Central Research & Development Laboratories, Inc.
- Makoto Nagaoka - Toyota Central Research & Development Laboratories, Inc.
- Taketoshi Fujikawa - Toyota Central Research & Development Laboratories, Inc.
- Katsuyuki Ohsawa - Toyota Central Research & Development Laboratories, Inc.
- Shigeki Yamaguchi
CitationNakakita, K., Nagaoka, M., Fujikawa, T., Ohsawa, K. et al., "Photographic and Three Dimensional Numerical Studies of Diesel Soot Formation Process," SAE Technical Paper 902081, 1990, https://doi.org/10.4271/902081.
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