Influence of Injector for Performance of N<sub>2</sub>O/DME Bipropellant Thruster
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- ASAKURA Takamasa
- Department of Mechanical Design Systems Engineering, University of Miyazaki
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- HAYASHI Shouta
- Department of Mechanical Design Systems Engineering, University of Miyazaki
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- YANO Yasuyuki
- Technical Center, University of Miyazaki
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- KAKAMI Akira
- Technical Center, University of Miyazaki
Abstract
<p>This paper describes the performance of a proposed bipropellant thruster using nitrous oxide (N2O) and dimethyl ether (DME). Conventionally, nitrogen tetroxide and hydrazine are used in thrusters for spacecraft, but requires gas treatment systems in the ground tests due to toxicity and reactivity to materials. Hence, we proposed to apply N2O and DME to a bipropellant thruster in order to develop a compact and eco-friendly bipropellant thruster. N2O and DME, which are liquefied gas, are neither toxic nor reactive to materials, and require no gas treatment system in the ground tests. Furthermore, the combustion chamber can be downsized because gaseous injection can eliminate the evaporation time. The application vapor pressures of 6.4 MPa (N2O) and 0.6 MPa (DME) at 25 °C to self-pressurization would eliminate the necessity of pressurant to simplifies the feeding systems. In this study, a 0.4-N class N2O/DME bipropellant thruster with two types of injector was prototyped, and tested in a vacuum chamber to clarify the dependence of injector design on characteristic velocity (C*) efficiency. Using an injector consisting of showerhead and subsequent 15-mm orifice, the thruster yields combustion chamber pressure of 0.27 MPa, with corresponding C*efficiency of 68.3 % at O/F = 3.5.</p>
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 16 (2), 177-180, 2018
THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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Keywords
Details 詳細情報について
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- CRID
- 1390001205319840896
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- NII Article ID
- 130006425115
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- ISSN
- 18840485
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed