JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleSingle fuel droplets combustion in non-uniform electric field under microgravity
Author(jpn)今村 宰; 久米 勲; 佐藤 順一; 津江 光洋; 河野 通方
Author(eng)Imamura, Osamu; Kume, Isao; Sato, Junichi; Tsue, Mitsuhiro; Kono, Michikata
Author Affiliation(jpn)東京大学 大学院; 東京大学 大学院工学系研究科; 石川島播磨重工業; 東京大学 工学部; 東京大学 大学院新領域創成科学研究科
Author Affiliation(eng)University of Tokyo Graduate School; University of Tokyo Graduate School of Engineering; Ishikawajima-Harima Heavy Industries Co. Ltd.; University of Tokyo Faculty of Engineering; University of Tokyo Graduate School of Frontier Sciences
Issue Date2005-03
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title宇宙利用シンポジウム 第21回 平成16年度
Space Utilization Research: Proceedings of the Twenty-first Space Utilization Symposium
Start page141
End page144
Publication date2005-03
AbstractExperiments of single droplets combustion were carried out in non-uniform electric field under microgravity. Non-uniformed electric filed are formed with a needle and a flat-plate electrode. Using this system, since electrons or ions are emitted from the needle electrode, not only effect of external electric filed on single droplet combustion but also effect of electron or ion movements can be examined. The distance between electrodes is 50 mm and applied voltages between electrodes are from 0 kV to 6 kV. The fuel tested is ethanol and ambient gas is air at atmosphere pressure and room temperature. In these conditions, the corona discharge was not observed. The flames are deformed to cathode in spite of voltage polarity, and flame shrinks in all direction with applied voltages. Burning rate constant increases with applied voltages when needle electrodes is cathode, however it does not change so much for the opposite voltage polarity. These experimental results are compared with the results in uniform electric fields and the degree of flame deformation and the increase in the burning rate constants when needle electrode is cathode is larger than that in uniform electric field. From these results, the effect of electron or ion movements is discussed.
Keywordsdroplet combustion; electric field; ethyl alcohol; spark gap; drop tower; flame characteristic radius; ionic wind; flame shape; burning rate; microgravity; 液滴燃焼; 電界; エチルアルコール; スパークギャップ; 落下塔; 火炎特性径; イオン風; 火炎形状; 燃焼速度; 微小重力
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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