| タイトル | Cruise performance of an isolated 1.15 pressure ratio turbofan propulsion system simulator at Mach numbers from 0.6 to 0.85 |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740020128 |
| 著者（英） | Steffen, F. W. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1974-06-01 |
| 言語 | eng |
| 内容記述 | An isolated 1.15 pressure ratio turbofan engine simulator was tested at Mach numbers from 0.6 to 0.85. At Mach 0.75 the net propulsive force of the fan and nacelle (excluding core thrust) was 73 percent of the ideal fan net thrust. Internal losses amounted to 7 percent, and external drag amounted to 20 percent of the ideal fan net thrust. External pressure and friction drag were about equal. The propulsive efficiency with a 90 percent efficient fan would have been 63 percent. For the aerodynamic characteristics of the nacelle that was tested, increasing the fan pressure ratio to approximately 1.35 would have resulted in a maximum propulsive efficiency of 67 percent. |
| NASA分類 | PROPULSION SYSTEMS |
| レポートNO | 74N28241
NASA-TM-X-3064
E-7824 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/194051 |
