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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

LOCAL HEAT TRANSFER CHARACTERISTICS OF A ROTATING DISK UNDER JET IMPINGEMENT COOLING

Get access (open in a dialog) DOI: 10.1615/IHTC11.2240
pages 445-450

Abstract

An extensive series of tests were conducted to investigate local heat transfer from a rotating disk under the combination of rotation and jet impingement. Several important factors, such as rotational Reynolds number, jet Reynolds number, and jet-to-disk distance were considered. Disk rotational speed was varied from 250 to 4,000 rpm while three jet Reynolds numbers close to 6800, 24000, and 48000 were used and jet-to-disk distance range varied from 1 to 8. Well-defined thermal and hydrodynamic boundary conditions were established for these experiments. The heat transfer measuring technique was a transient technique which employed liquid crystals. The results of this investigation reveal that in most cases local heat transfer distribution is ruled by the intensity (power) with which either jet impingement or rotation dominates the flow field.