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The influence of free-stream turbulence on turbulent boundary layers with mild adverse pressure gradients
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hoffmann, Jon A. |
| Copyright Year | 1988 |
| Description | The influence of near isotropic free-stream turbulence on the shape factors and skin friction coefficients of turbulent bounday layers is presented for the cases of zero and mild adverse pressure gradients. With free-stream turbulence, improved fluid mixing occurs in boundary layers with adverse pressure gradients relative to the zero pressure gradient condition, with the same free-stream turbulence intensity and length scale. Stronger boundary layers with lower shape factors occur as a result of a lower ratio of the integral scale of turbulence to the boundary layer thickness, and to vortex stretching of the turbulent eddies in the free stream, both of which act to improve the transmission of momentum from the free stream to the boundary layers. |
| File Size | 1491582 |
| Page Count | 54 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890005997 |
| Archival Resource Key | ark:/13960/t7np6zk1g |
| Language | English |
| Publisher Date | 1988-11-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Thickness Momentum Transfer Skin Friction Vortices Turbulent Boundary Layer Isotropic Turbulence Shapes Free Flow 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 |
