Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
652770 | Experimental Thermal and Fluid Science | 2007 | 16 Pages |
Abstract
This article presents an experimental study of the heat transfers in a discoidal rotor-stator system air-gap. Measurements are performed over the rotor, using an experimental technique based on infrared thermography, in order to determine the surface temperatures. Using a thermal balance, the local convective heat transfer coefficient is identified. The influences of the rotational Reynolds number Re and the dimensionless spacing between the two disks G are carried out and compared with literature data when available. Local convective heat transfer coefficients are obtained for Re ranging from 1.29Â ÃÂ 105 to 6.45Â ÃÂ 105 and for G between 0.01 and 0.16. Four heat transfer regimes are identified then correlated. Comparisons with our previous results concerning flow and heat transfers over a single rotating disk in still air are also carried out.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Julien Pellé, Souad Harmand,