| タイトル | Numerical simulation of boundary layers. Part 2: Ribbon-induced transition in Blasius flow |
| 本文（外部サイト） | http://hdl.handle.net/2060/19860022351 |
| 著者（英） | Yang, K. S.; Spalart, P. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1986-02-01 |
| 言語 | eng |
| 内容記述 | The early three-dimensional stages of transition in Blasius boundary layers are studied by numerical solution of the Navier-Stokes equations. A finite-amplitude two-dimensional wave and random low-amplitude three-dimensional disturbances are introduced. Rapid amplification of the three-dimensional components is observed and leads to transition. For intermediate amplitudes of the two-dimensional wave the breakdown is of subharmonic type, and the dominant spanwise wave number increases with the amplitude. For high amplitudes the energy of the fundamental mode is comparable to the energy of the subharmonic mode, but never dominates it; the breakdown is of mixed type. Visualizations, energy histories, and spectra are presented. The sensitivity of the results to various physical and numerical parameters is studied. Agreement with experimental and theoretical results is discussed. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 86N31823
NAS 1.15:88221
A-86072
NASA-TM-88221 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/153261 |
