| タイトル | Interaction of a streamwise vortex with a turbulent mixing layer |
| 著者（英） | Mehta, Rabindra D.; Bell, James H. |
| 著者所属（英） | Stanford Univ.|NASA Ames Research Center |
| 発行日 | 1990-11-01 |
| 言語 | eng |
| 内容記述 | The interaction of a single streamwise vortex with a plane turbulent mixing layer is experimentally studied. Initially, near the mixing layer origin, the vortex rides just below the layer and only affects the mixing layer properties near the bottom side of the mixing layer. Once the vortex starts to become embedded within the mixing layer and active interaction has begun, the effect of the vortex is to grossly distort the mean velocity and turbulence contours over the whole width of the mixing layer. The induced cross-flow velocities in the mixing layer result in the production of additional normal Reynolds stresses which in turn act with mean flow gradients to generate extra shear stresses. In particular, the secondary shear stress (SSS) achieves an absolute peak value equivalent to about 40 percent of the maximum primary shear stress. The position and decay of the SSS peak are then found to be strongly correlated with those of the streamwise vortex. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 91A15165 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/351796 |
|
