Combustion Behavior of Single Fuel Droplets in Non-Uniform Electric Field under Microgravity
- Paper number
IAC-05-A2.7.07
- Author
Mr. Osamu Imamura, University of Tokyo, Japan
- Coauthor
Mr. Isao Kume, University of Tokyo, Japan
- Coauthor
Mr. Muneatsu Kakinoki, University of Tokyo, Japan
- Coauthor
Mr. Jun Osaka, University of Tokyo, Japan
- Coauthor
Dr. Jun'ichi Sato, Ishikawajima-Harima Heavy Industries Co.,Ltd., Japan
- Coauthor
Prof. Mitsuhiro Tsue, University of Tokyo, Japan
- Coauthor
Prof. Michikata Kono, University of Tokyo, Japan
- Year
2005
- Abstract
Droplet combustion in electric field is interesting in terms of not only scientific aspects but also combustion control. In this study, single fuel droplets are burned in non-uniform electric filed, which is formed with a needle and a flat-plate electrode. Using this system, the effect of electron emission from the needle cathode are expected as well as effect of external electric filed on single droplet combustion. Since similar experiments in uniform electric fields are supposedly affected by only external electric fields, the effect of electron movements could be discussed comparing with uniform and non-uniform electric field experiments. All experiments are carried out under microgravity in order to eliminate the natural buoyancy. The distance between the electrodes is 50 mm and direct current voltages applied between them from 0kV to 6kV. Ambient gas is air at atmosphere pressure and room temperature. In these conditions, the corona discharge was not observed. The fuel tested is ethanol and n-octane. The results show that the flames for both fuels are deformed to cathode with applying electric voltages in spite of voltage polarity. On the other hand, burning rate constant for ethanol increases with applied voltages only when needle electrode is cathode. For n-octane flame, extinction is observed in high applied voltages. These experimental results are compared with the results in uniform electric fields and the effect of electron movements and fuel characteristics are discussed.
- Abstract document
- Manuscript document
IAC-05-A2.7.07.pdf (🔒 authorized access only).
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