書誌事項
- タイトル別名
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- Numerical Study on the Transition between Electrothermal and Electromagnetic Acceleration Modes in an MPD Thruster
- MPD スラスタ ナイ ニ オケル デンネツ デンジ カソク モード カン ノ センイ ニ カンスル ケンキュウ
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It is widely known that a self-field MPD thruster changes from an electrothermal acceleration mode to an electromagnetic one as the discharge current is increased. Such transitional behavior is numerically studied with argon propellant using a two-dimensional TVD Lax-Friedrich scheme incorporating multiple ionization processes. As the discharge current J is increased from 4 to 10kA under a mass flow rate of 0.8g/s, a steep rise of the voltage, which indicates the transition, occurs between low and high current modes of operation around J=7kA, which is equivalent to the Alfvén’s critical ionization current. The steep voltage rise is attributed to the increase in the work of the Lorentz force around the cathode. The radial distributions of the heavy particles and electrons are examined and compared with the past experimental results. Additionally, in the electromagnetic mode, the ratio of the ionization energy to the input power decreases with increasing input power, and the maximum ratio of the kinetic energy to the input power is 0.57. This high thrust efficiency can be attributed to the idealized model, in which the effects of the sheath as well as the heat loss to the electrodes are neglected.
収録刊行物
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- 日本航空宇宙学会論文集
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日本航空宇宙学会論文集 54 (635), 535-541, 2006
一般社団法人 日本航空宇宙学会
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詳細情報 詳細情報について
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- CRID
- 1390001204469003008
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- NII論文ID
- 10018580478
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- NII書誌ID
- AA11307372
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- ISSN
- 24323691
- 13446460
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- NDL書誌ID
- 8619751
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可