| タイトル | Comparison of inlet suppressor data with approximate theory based on cutoff ratio |
| 本文（外部サイト） | http://hdl.handle.net/2060/19800007616 |
| 著者（英） | Rice, E. J.; Heidelberg, L. J. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | Inlet suppressor far-field directivity suppression was quantitatively compared with that predicted using an approximate linear design and evaluation method based upon mode cutoff ratio. The experimental data was obtained using a series of cylindrical point-reacting inlet liners on a YF102 engine. The theoretical prediction program is based upon simplified sound propagation concepts derived from exact calculations. These indicate that all of the controlling phenomenon can be approximately correlated with mode cutoff ratio which itself is intimately related to the angles of propagation within the duct. The theory-data comparisons are intended to point out possible deficiencies in the approximate theory which may be corrected. After all theoretical refinements are made, then empirical corrections can be applied. |
| NASA分類 | ACOUSTICS |
| レポートNO | 80N15876
NASA-TM-81386
E-294 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/173588 |
