Autoignition and Combustion of a Fuel Droplet Array at High Pressures under Microgravity
- Paper number
IAC-05-A2.7.03
- Author
Dr. Daisuke Segawa, Osaka Prefecture University, Japan
- Coauthor
Mr. Tomoki Kajikawa, Osaka Prefecture University, Japan
- Coauthor
Mr. Shuichi Hirota, Osaka Prefecture University, Japan
- Coauthor
Dr. Shinji Nakaya, Osaka Prefecture University, Japan
- Coauthor
Prof. Toshikazu Kadota, Osaka Prefecture University, Japan
- Year
2005
- Abstract
An experimental study has been performed under microgravity condition to obtain the detailed information needed for the deep understanding of the combustion phenomena of a fuel droplet array, which autoignites in supercritical gaseous environment. The microgravity environment aboard the capsule of the drop shaft at MGLAB was utilized for the experiments. A fuel droplet suspended at the tip of a fine quartz fiber in the cold section of the high-pressure combustion chamber was transferred quickly to be subjected to a hot gas in an electric furnace. This resulted in the evaporation, autoignition and combustion of the fuel droplet in supercritical gaseous environment. The ignition delay increased a little and the pressure effect on the ignition delay decreased with a decrease of droplet spacing. The burning time increased monotonically with a decrease of droplet spacing. A time period of the early stage of droplet heating was longer and the burning rate was smaller with smaller droplet spacing. A distance between the droplets and the outer edge of the luminous flame formed around the droplets was larger with smaller droplet spacing.
- Abstract document
- Manuscript document
IAC-05-A2.7.03.pdf (🔒 authorized access only).
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