| タイトル | Aerodynamic and acoustic effects of eliminating core swirl from a full scale 1.6 stage pressure ratio fan (QF-5A) |
| 本文（外部サイト） | http://hdl.handle.net/2060/19790002830 |
| 著者（英） | Acker, L. W.; Stakolich, E. G.; Woodward, R. P. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1978-09-01 |
| 言語 | eng |
| 内容記述 | Fan QF-5A was a modification of fan QF-5 which had an additional core stator and adjusted support struts to turn the core exit flow from a 30 deg swirl to the axial direction. This modification was necessary to eliminate the impingement of the swirling core flow on the axial support pylon of the NASA-Lewis Quiet Fan Facility that caused aerodynamic, acoustic and structural problems with the original fan stage at fan speeds greater than 85 percent of design. The redesigned fan QF-5A did obtain the design bypass ratio with an increased core airflow suggesting that the flow problem was resolved. Acoustically, the redesigned stage showed a low frequency broadband noise reduction compared to the results for fan QF-5 at similar operating conditions. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 79N11001
E-9774
NASA-TM-78991 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/177313 |
