| タイトル | A theory for predicting boundary impedance and resonance frequencies of slotted-wall wind tunnels, including plenum effects |
| 本文（外部サイト） | http://hdl.handle.net/2060/19810020558 |
| 著者（英） | Barger, R. L. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1981-07-01 |
| 言語 | eng |
| 内容記述 | Wave-induced resonance associated with the geometry of wind-tunnel test sections can occur. A theory that uses acoustic impedance concepts to predict resonance modes in a two dimensional, slotted wall wind tunnel with a plenum chamber is described. The equation derived is consistent with known results for limiting conditions. The computed resonance modes compare well with appropriate experimental data. When the theory is applied to perforated wall test sections, it predicts the experimentally observed closely spaced modes that occur when the wavelength is not long compared with he plenum depth. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 81N29096
NASA-TP-1880
L-14480 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/168382 |
