heat transfer measurements on a rotating disk
Clicks: 262
ID: 198218
1997
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Abstract
Heat transfer to a rotating disk is measured for a wide range of Reynolds number values in
the laminar, transitional and turbulent flow regimes. Measurements are performed by making
use of the heated-thin-foil technique and by gauging temperature maps with an infrared
scanning radiometer. The use of the IR radiometer is advantageous on account of its relatively
good spatial resolution and thermal sensitivity and because it allows one to perform
measurements down to very low local Reynolds numbers. Data is obtained on three disks,
having an external diameter varying from 150mm to 450mm; the smallest disk is used only
to measure the adiabatic wall temperature and can rotate up to 21,O00rpm. Heat transfer
results are presented in terms of Nusselt and Reynolds numbers based on the local radius and
show a substantial agreement with previous experimental and theoretical analyses. Transition
to turbulent flow is found at about Re=250,000. A discussion about the role played by the adiabatic wall temperature is also
included.
| Reference Key |
cardone1997internationalheat
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|---|---|
| Authors | ;G. Cardone;T. Astarita;G. M. Carlomagno |
| Journal | ACS omega |
| Year | 1997 |
| DOI |
10.1155/S1023621X97000018
|
| URL | |
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