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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

TRANSIENT ANALYSIS OF HEAT TRANSFER IN A ROTATING CAVITY WITH A RADIAL OUTFLOW OF FLUID

Get access (open in a dialog) DOI: 10.1615/IHTC8.2170
pages 1257-1263

Resumo

Nusselt numbers have been measured under transient conditions on the heated downstream disc of a rotating cavity with an axial inflow and radial outflow of air. The cavity was made from discs of 762-mm diameter, separated by an axial gap of 102 mm, and a perforated peripheral shroud. Tests were conducted for a range of rotational speeds up to 2000 rev/min and flow rates up to 0.1 kg/s.
Provided that Ekman-layer flow occurred, the measured local and average Nusselt numbers were in reasonable agreement with values obtained from solutions of the turbulent momentum- and energy-integral equations. If the flow rate were too high or the rotational speed too low for Ekman-layer flow to occur, the measured Nusselt numbers were in satisfactory agreement with empirical correlations for wall-jet flow.