| タイトル | Observations and implications of natural laminar flow on practical airplane surfaces |
| 著者（英） | Holmes, B. J.; Obara, C. J. |
| 著者所属（英） | Kentron International, Inc.|NASA Langley Research Center |
| 発行日 | 1982-01-01 |
| 言語 | eng |
| 内容記述 | The results of natural laminar flow (NLF) experiments conducted by NASA to determine if modern aircraft structures can benefit from NLF as do sailplanes are presented. Seven aircraft, ranging from a Cessna 210 to a Learjet 28/29, with relatively stiff skins were flown in production configurations with no modifications. Measurements were made of the boundary-layer laminar to turbulent transition locations on various aerodynamic surfaces, the effect of a total loss of laminar flow, the effect of the propeller slipstream on the wing boundary-layer transition and the boundary-layer profiles, the wing section profile drag, the effect of flight through clouds, and insect debris contamination effects. Favorable pressure gradients for NLF were concluded to be feasible up to a transition Reynolds number of 11 million. Laminar flows were observed in propeller slipstreams, and insects were found to cause transition 1/4 of the time. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 82A40893 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/409418 |
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