Loading...
Please wait, while we are loading the content...
Similar Documents
Turbulent boundary layer on a convex, curved surface
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Moffat, R. J. Johnston, J. P. Kays, W. M. Gillis, J. C. |
| Copyright Year | 1980 |
| Description | The effects of strong convex curvature on boundary layer turbulence were investigated. The data gathered on the behavior of Reynolds stress suggested the formulation of a simple turbulence model. Three sets of data were taken on two separate facilities. Both rigs had flow from a flat surface, over a convex surface with 90 deg of turning, and then onto a flat recovery surface. The geometry was adjusted so that, for both rigs, the pressure gradient along the test surface was zero - thus avoiding any effects of streamwise acceleration on the wall layers. Results show that after a sudden introduction of curvature, the shear stress in the outer part of the boundary layer is sharply diminished and is even slightly negative near the edge. The wall shear also drops off quickly downstream. In contrast, when the surface suddenly becomes flat again, the wall shear and shear stress profiles recover very slowly towards flat wall conditions. |
| File Size | 10305739 |
| Page Count | 312 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810007897 |
| Archival Resource Key | ark:/13960/t74v1dr94 |
| Language | English |
| Publisher Date | 1980-09-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Laminar Flow Turbulence Models Turbulent Boundary Layer Shear Stress Convexity Flat Surfaces Concavity Heat Transfer Pressure Gradients Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
