| タイトル | Development and evaluation of a 1 kW plasma torch ignitor for scramjets |
| 著者（英） | Northam, G. Burton; Wagner, Timothy C.; Eggers, James M.; Obrien, Walter F. |
| 著者所属（英） | Virginia Polytechnic Inst. and State Univ.; NASA Langley Research Center |
| 発行日 | 1986-10-01 |
| 言語 | eng |
| 内容記述 | A low power, uncooled plasma torch was tested in combination with a new injector design to study ignition and flameholding in hydrogen-fueled supersonic flows. Both semifree jet and ducted tests were conducted in a Mach 2 flow under simulated scramjet combustor conditions at 1 atmosphere static pressure and total temperatures between 1400 and 2800 R. The injector design incorporates a small upstream pilot fuel flow, a step for recirculation, and primary fuel injectors downstream of the recirculation region. Using a 1:1 volumetric mixture of hydrogen and argon, good performance at a simulated flight Mach number of 3.7 is found for a 1-kW torch which is located in the recirculation zone and fueled by the upstream pilot fuel injectors. Spectroscopic measurements verified the presence of hydrogen atoms in the torch exhaust, and it is suggested that hydrogen atoms are responsible for the ignition. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 87A23258 |
| 権利 | Copyright |
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