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International Heat Transfer Conference 6

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

FLOW AND TEMPERATURE FIELDS FOLLOWING INJECTION OF A JET NORMAL TO A CROSS STREAM

Richard J. Goldstein
Heat Transfer Laboratory, Department of Mechanical Engineering, University of Minnesota Twin Cities, 111 Church St SE, Minneapolis, MN-55455, USA

V. L. Eriksen
Deltak Corporation, Minneapolis, Minnesota

J. W. Ramsey
University of Minnesota, Minneapolis, Minnesota

DOI: 10.1615/IHTC6.1240
pages 255-260

Abstract

The interaction of a jet entering into a freestream normal to the main flow direction has been studied with particular attention directed to visualization of the large-scale flow interactions and to measurement of the film-cooling performance. Large eddies are apparent downstream of the entering jet even at moderate blowing rate (defined as the ratio of the mass velocity of the jet to the mass velocity of the free-stream). At higher blowing rate, there is only intermittent contact between the mass from the jet and the downstream wall. The film cooling downstream from a single normal jet yields a lower centerline effectiveness compared to an inclined jet through a greater lateral spreading. The greater spreading provides a more uniform effectiveness across the span of the downstream wall, in particular at large blowing rate.

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