| タイトル | Recent testing of 30 KW hydrogen arcjet thrusters |
| 著者（英） | Haag, Thomas W. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1993-06-01 |
| 言語 | eng |
| 内容記述 | NASA is conducting efforts to evaluate high-power hydrogen arcjets for orbit transfer propulsion applications. As part of this program, an attempt was made to reexamine both radiatively- and regeneratively-cooled, 30 kW thrusters first demonstrated by the Giannini Scientific Corp. in 1963. The arcjets were configured to force arc attachment upstream of the throat in a subsonic chamber region. While thruster currents were steady, the voltage traces exhibited sawtooth waveforms at frequencies on the order of 20 kHz. Voltage variations per cycle were typically between 100 and 310 volts, indicating major changes in the position of the arc attachment with time. When operated at their respective design points, the performance of both thrusters fell below the values listed in the 1960's development reports. The reason for the discrepancies is not currently understood and further investigations are in progress. However, the recently measured efficiencies were high compared to those obtained with constricted-arc designs at similar conditions, and further arcjet performance optimizations may be possible. |
| NASA分類 | SPACECRAFT PROPULSION AND POWER |
| レポートNO | 93A49772
AIAA PAPER 93-1902 |
| 権利 | Copyright |
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