| タイトル | Studies of blade-vortex interaction noise reduction by rotor blade modification |
| 著者（英） | Brooks, Thomas F. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1993-01-01
1993 |
| 言語 | eng |
| 内容記述 | Blade-vortex interaction (BVI) noise is one of the most objectionable types of helicopter noise. This impulsive blade-slap noise can be particularly intense during low-speed landing approach and maneuvers. Over the years, a number of flight and model rotor tests have examined blade tip modification and other blade design changes to reduce this noise. Many times these tests have produced conflicting results. In the present paper, a number of these studies are reviewed in light of the current understanding of the BVI noise problem. Results from one study in particular are used to help establish the noise reduction potential and to shed light on the role of blade design. Current blade studies and some new concepts under development are also described. |
| NASA分類 | ACOUSTICS |
| レポートNO | 95A90093 |
| 権利 | Copyright |
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