| タイトル | Fan Noise Prediction System Development: Source/Radiation Field Coupling and Workstation Conversion for the Acoustic Radiation Code |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970017414 |
| 著者（英） | Meyer, H. D. |
| 著者所属（英） | United Technologies Corp. |
| 発行日 | 1993-04-01 |
| 言語 | eng |
| 内容記述 | The Acoustic Radiation Code (ARC) is a finite element program used on the IBM mainframe to predict far-field acoustic radiation from a turbofan engine inlet. In this report, requirements for developers of internal aerodynamic codes regarding use of their program output an input for the ARC are discussed. More specifically, the particular input needed from the Bolt, Beranek and Newman/Pratt and Whitney (turbofan source noise generation) Code (BBN/PWC) is described. In a separate analysis, a method of coupling the source and radiation models, that recognizes waves crossing the interface in both directions, has been derived. A preliminary version of the coupled code has been developed and used for initial evaluation of coupling issues. Results thus far have shown that reflection from the inlet is sufficient to indicate that full coupling of the source and radiation fields is needed for accurate noise predictions ' Also, for this contract, the ARC has been modified for use on the Sun and Silicon Graphics Iris UNIX workstations. Changes and additions involved in this effort are described in an appendix. |
| NASA分類 | Acoustics |
| レポートNO | 97N19687
NASA-CR-204340
NAS 1.26:204340 |
| 権利 | No Copyright |
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