| タイトル | A parametric study of transonic blade-vortex interaction noise |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910022614 |
| 著者（英） | Lyrintzis, A. S. |
| 著者所属（英） | Minnesota Univ. |
| 発行日 | 1991-06-30 |
| 言語 | eng |
| 内容記述 | Several parameters of transonic blade-vortex interactions (BVI) are being studied and some ideas for noise reduction are introduced and tested using numerical simulation. The model used is the two-dimensional high frequency transonic small disturbance equation with regions of distributed vorticity (VTRAN2 code). The far-field noise signals are obtained by using the Kirchhoff method with extends the numerical 2-D near-field aerodynamic results to the linear acoustic 3-D far-field. The BVI noise mechanisms are explained and the effects of vortex type and strength, and angle of attack are studied. Particularly, airfoil shape modifications which lead to noise reduction are investigated. The results presented are expected to be helpful for better understanding of the nature of the BVI noise and better blade design. |
| NASA分類 | ACOUSTICS |
| レポートNO | 91N31928
NAS 1.26:188811
NASA-CR-188811 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/130928 |
