| タイトル | Shuttle orbiter boundary layer transition at flight and wind tunnel conditions |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840002082 |
| 著者（英） | Derry, S. M.; Goodrich, W. D.; Bertin, J. J. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 1983-10-01 |
| 言語 | eng |
| 内容記述 | Hypersonic boundary layer transition data obtained on the windward centerline of the Shuttle orbiter during entry for the first five flights are presented and analyzed. Because the orbiter surface is composed of a large number of thermal protection tiles, the transition data include the effects of distributed roughness arising from tile misalignment and gaps. These data are used as a benchmark for assessing and improving the accuracy of boundary layer transition predictions based on correlations of wind tunnel data taken on both aerodynamically rough and smooth orbiter surfaces. By comparing these two data bases, the relative importance of tunnel free stream noise and surface roughness on orbiter boundary layer transition correlation parameters can be assessed. This assessment indicates that accurate predications of transition times can be made for the orbiter at hypersonic flight conditions by using roughness dominated wind tunnel data. Specifically, times of transition onset and completion is accurately predicted using a correlation based on critical and effective values of a roughness Reynolds number previously derived from wind tunnel data. |
| NASA分類 | SPACE TRANSPORTATION |
| レポートNO | 84N10149 |
| 権利 | No Copyright |
|
