| タイトル | Experiments on a separation bubble over an Eppler 387 airfoil at low Reynolds numbers using thin-film arrays |
| 著者（英） | Chokani, Ndaona; Mousseux, Marc C.; Stack, John P.; Mcghee, Robert J. |
| 著者所属（英） | Arizona State Univ.|NASA Langley Research Center|North Carolina State Univ. |
| 発行日 | 1990-01-01 |
| 言語 | eng |
| 内容記述 | Experiments carried out at the NASA Langley Low-Turbulence Pressure Tunnel on an Eppler 387 airfoil at several angles of attack for Reynolds numbers of 100,000 to 300,000 are discussed. Cross-correlations and phase diagrams are used in calculating velocities, while spectra are used in checking for amplified frequencies, and coherence plots for causality. Hot-film measurements, oil-flow visualization, pressure measurements, and Drela code are compared for finding the leading and trailing edges of the bubble. It is observed that all methods agree in showing the beginning and end of the separation bubble, the velocity measurements agree in magnitude for the lower velocities, and wave packets appear in the cross-correlation. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 91A31332 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/349179 |
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