| Autor: |
Bernard Desmet, Barbara Watel, Souad Harmand |
| Rok vydání: |
2000 |
| Předmět: |
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| Zdroj: |
International Journal of Thermal Sciences. 39:404-413 |
| ISSN: |
1290-0729 |
| DOI: |
10.1016/s1290-0729(00)00218-0 |
| Popis: |
The local convective heat transfer from a rotor with a 310 mm outer radius is studied experimentally at a distance of 3 mm from a coaxial crown-shaped stator with a 176 mm inner radius and a 284 mm outer radius. The experimental technique is based on the use of a thermally thick rotor heated from behind by infrared radiation. The local heat flux distribution from the rotor surface is identified by resolving the Laplace equation by finite difference method using the experimental temperature distribution as boundary conditions. The tests are carried out with the single rotor and the stator/rotor system for local rotational Reynolds numbers ranging from 2.0·104 to 1.47·106 and thus sweeping across the laminar, transition and turbulent flow regimes. The local and mean Nusselt numbers for the single disc are compared with those obtained experimentally for the stator/rotor system. The flow structure in the space between the rotor and the stator is analysed by Particule Image Velocimetry. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect