| タイトル | Analysis of the surface load and radiated sound of a vibrating airfoil with application to the experiment of Brooks |
| 本文（外部サイト） | http://hdl.handle.net/2060/19850008281 |
| 著者（英） | Yates, J. E. |
| 著者所属（英） | Aeronautical Research Associates of Princeton, Inc. |
| 発行日 | 1984-01-01 |
| 言語 | eng |
| 内容記述 | A method is developed for calculating the surface load and radiated sound from a vibrating surface in a compressible viscous fluid. The method is applied to a thin two-dimensional elliptic cross-section. For large values of the viscous diffusion parameter, the surface load tends to an elliptic distribution in agreement with the results of inviscid theory when edge pressure continuity is enforced. For thin surfaces, the surface load is insensitive to variations in the thickness ratio. A three-dimensional spectral technique is developed to calculate the inviscid surface load and radiated sound from a thin vibrating airfoil. The inviscid theory predicts the correct form of the far field sound pressure and its phase. The actual levels are somewhat sensitive to the choice of theoretical spanwise surface pressure mode but are in better agreement with the experiment than the surface pressure. The comparison of theoretical and experimental surface pressure indicates that the viscous theory, used to validate the inviscid theory, is either inadequate or there is a source of experimental error. |
| NASA分類 | ACOUSTICS |
| レポートNO | 85N16590
NAS 1.26:3864
NASA-CR-3864
ARAP-508 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/157420 |
