Effectiveness and Heat Transfer for a Turbulent Boundary Layer With Tangential Injection and Variable Free-Stream Velocity
| Autor: | R. A. Seban, L. H. Back |
|---|---|
| Rok vydání: | 1962 |
| Předmět: |
Materials science
Convective heat transfer Mechanical Engineering Boundary layer control Heat transfer coefficient Mechanics Condensed Matter Physics Atmospheric sciences Boundary layer thickness Churchill–Bernstein equation Flow separation Boundary layer Mechanics of Materials Blasius boundary layer General Materials Science |
| Zdroj: | Journal of Heat Transfer. 84:235-242 |
| ISSN: | 1528-8943 0022-1481 |
| DOI: | 10.1115/1.3684348 |
| Popis: | The effectiveness and the heat transfer have been measured in a system involving the tangential injection of air from a single spanwise slot into the turbulent boundary layer of an external air stream, with the velocity of the external stream increasing in a way that concentrated the acceleration in a region downstream of the initial mixing zone. The effectiveness was changed but little from the value that would have existed had the free-stream velocity remained at its initial value and both temperature profiles and analytical considerations show that this invariability of the effectiveness is associated with thermal boundary-layer thicknesses that are much larger than the hydrodynamic thicknesses. Heat-transfer coefficients are shown to be predictable from existing information provided that the momentum thickness Reynolds number is large enough. |
| Databáze: | OpenAIRE |
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