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Microplasma thruster powered by X-band microwaves
http://hdl.handle.net/10131/00012199
http://hdl.handle.net/10131/000121994c6de75b-17bc-4b39-b034-5a725a901ff1
名前 / ファイル | ライセンス | アクション |
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1.2019.Takahashi,T.JAP.125.083301.pdf (4.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-02-25 | |||||
タイトル | ||||||
タイトル | Microplasma thruster powered by X-band microwaves | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Takahashi, Takeshi
× Takahashi, Takeshi× Mori, Daisuke× Kawanabe, Tetsuo× Takao, Yoshinori× Eriguchi, Koji× Ono, Kouichi |
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著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Present address: Sigma Corporation | ||||||
著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Present address: Mitsubishi Heavy Industries, Ltd., Nagoya Aerospace Systems Works | ||||||
著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Present address: Hitachi Ltd., Central Research Laboratory | ||||||
著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Present address: Division of Systems Research, Faculty of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University | ||||||
著者所属 | ||||||
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Joining and Welding Research Institute, Osaka University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A microplasma thruster of the electrothermal type has been developed with X-band (f = 11 GHz) microwaves and Ar as a propellant. The emphasis was placed on an understanding of distinguished features of the microplasma generation and thrust performance by X-band microwaves, compared with those by S-band (f = 4 GHz) ones. The thruster consisted of a microplasma source 2 mm in the inner diameter and 3–12 mm long with a rod antenna on the axis, followed by a converging-diverging micronozzle. Azimuthally symmetric surface wave-excited plasmas were established by microwaves at powers of ≤6 W, with the source pressure in the range 2–50 kPa at flow rates of 10–70 sccm. The plasma generation, nozzle flow, and thrust performance were numerically analyzed using a two-dimensional fluid model, coupled with an electromagnetic model for microwaves interacting with plasmas in the source region. Simulations indicated that higher frequency f = 11 GHz with the source chamber length Ls ≈ 1/4 of the driving wavelength λ is preferred for the microplasma thruster in terms of efficient plasma generation, gas heating, and thus thrust performance as well as system compactness; moreover, in f = 11 GHz discharges with longer Ls ≈ 3λ/4, standing-wave striation-like plasma structures occur in the axial direction. Experiments were made for f = 11 and 4 GHz microwaves with the respective Ls ≈ λ/4, where the plasma electron density and gas temperature in the microplasma source were measured by optical emission spectroscopy with a small amount of H2 and N2 added. The electron density and gas temperature were in the range of (4–12) × 1019 m−3 and 800–1000 K for f = 11 GHz, being ∼10%–50% higher than those for f = 4 GHz. The thrust performance was also measured by a target-type microthrust stand, giving a thrust, specific impulse, and thrust efficiency in the range 0.2–1.8 mN, 65–90 s, and 2%–14% for f = 11 GHz, which were ∼10%–15% higher than those for f = 4 GHz. These experimental results were consistent with those of simulations, depending on microwave frequency, power, chamber size, and gas flow rate. | |||||
書誌情報 |
Journal of applied physics 巻 125, 号 8, p. 083301-01-083301-21, 発行日 2019-02-28 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00218979 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00693547 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1063/1.5054790 | |||||
権利 | ||||||
権利情報 | ©2019 AIP Publishing. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |