Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2004.03a
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- Pages.611-616
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- 2004
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- 1975-342X(pISSN)
Thrust Performances of a Very Low-Power Micro-Arcjet
- Hotaka Ashiya (Department of Aerospace Engineering. Tokai University) ;
- Tsuyoshi Noda (Department of Aerospace Engineering. Tokai University) ;
- Hideyuki Horisawa (Department of Aerospace Engineering. Tokai University) ;
- Kim, Itsuro ura (Professor Emeritus. University of Tokyo. and Nara Textile Inc.)
- Published : 2004.03.01
Abstract
In this study, microfabrication of a micro-arcjet nozzle with Fifth-harmonic generation Nd:YAG pulses (wavelength 213 nm) and its thrust performance tests were conducted. A micro-arcjet nozzle was machined in a 1.2 mm thick quartz plate. Sizes of the nozzle were 0.44 mm in width of the nozzle exit and constrictor diameter of 0.1 mm. For an anode, a thin film of Au (~100 nm thick) was deposited by DC discharge PVD in vacuum on divergent part of the nozzle. As for a cathode, an Au film was also coated on inner wall surface. In operational tests, a stable discharge was observed for mass flow of 1.0mg/sec, discharge current of 6 ㎃, discharge voltage of 600 V, or 3.6 W input power (specific power of 3.6 MW/kg). In this case, plenum pressure of the discharge chamber was 80 ㎪. With 3.6 W input power, thrust obtained was 1.4 mN giving specific impulse of 138 sec with thrust efficiency of 24 %.