| タイトル | Analysis of normal shock noise measurements on nose-cylinder bodies. |
| 著者（英） | Reding, J. P.; Guenther, R. A. |
| 発行日 | 1972-06-01 |
| 言語 | eng |
| 内容記述 | Aerodynamic noise measurements have been obtained on three nose-cylinder configurations (15 deg cone-cylinder, biconic nose-cylinder and biconic nose-corrogated cylinder) in transonic flow. The noise environment at the foot of the terminal normal shock and its associated separated flow bubble were examined in detail. A peak in the frequency spectra of the separated flow region was observed which compares well with the predicted resonance frequency of the separated pocket using Trilling's incident shock model. As a consequence of the observed sound spectra and noise level, a flow model is postulated which consist of a cellular separated flow region. In the central portion of the cell the flow resembles the classical two-dimensional recirculating bubble, but each cell is vented by a pair of counter rotating vortices, which start at the surface and steam downstream. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 72A34068
AIAA PAPER 72-669 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/461699 |
|
