| タイトル | Cross-flow vortex structure and transition measurements using multi-element hot films |
| 著者（英） | Mangalam, Siva M.; Maddalon, Dal V.; Agarwal, Naval K.; Collier, Fayette S., Jr. |
| 著者所属（英） | Analytical Services and Materials, Inc.; NASA Langley Research Center |
| 発行日 | 1991-01-01 |
| 言語 | eng |
| 内容記述 | An experiment on a 45-degree swept wing was conducted to study three-dimensional boundary-layer characteristics using surface-mounted, micro-thin, multi-element hot-film sensors. Cross-flow vortex structure and boundary-layer transition were measured from the simultaneously acquired signals of the hot films. Spanwise variation of the root-mean-square (RMS) hot-film signal show a local minima and maxima. The distance between two minima corresponds to the stationary cross-flow vortex wavelength and agrees with naphthalene flow-visualization results. The chordwise and spanwise variation of amplified traveling (nonstationary) cross-flow disturbance characteristics were measured as Reynolds number was varied. The frequency of the most amplified cross-flow disturbances agrees with linear stability theory. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 91A21389
AIAA PAPER 91-0166 |
| 権利 | Copyright |
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