| タイトル | Acoustic properties associated with rectangular geometry supersonic nozzles |
| 著者（英） | Ponton, M. K.; Seiner, J. M.; Manning, J. C. |
| 著者所属（英） | NASA Langley Research Center; Kentron International, Inc. |
| 発行日 | 1986-07-01 |
| 言語 | eng |
| 内容記述 | Acoustic property experiments have been conducted to ascertain the behavior of rectangular geometry supersonic nozzles whose throat aspect ratios vary over a 2.0-7.6 range, and whose three partial sidewall geometries range from full to 75-percent cutback. The tests employed unheated air at static conditions for nozzle Mach numbers of 1.35-1.66. It is found that sonic fatigue failures are possible at certain partial sidewall geometries and high nozzle aspect ratios. Unlike axisymmetric supersonic nozzles, shock noise dominates both the rear and forward arc for throat aspect ratio cases greater than 5.6. Jet screech frequency was adequately predicted with a simple vortex sheel model. |
| NASA分類 | ACOUSTICS |
| レポートNO | 86A45487
AIAA PAPER 86-1867 |
| 権利 | Copyright |
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