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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

HEAT TRANSFER IN AN AXISYMMETRIC CONFINED JET WITH BLUFF BODY

Get access (open in a dialog) DOI: 10.1615/IHTC10.1150
pages 107-112

Abstract

A local maximum appears in the distribution of Nusselt numbers of the axisymmetric confined jet with a cylindrical ring. It has been confirmed by the flow visualization and the spectral analysis of velocity fluctuation that the axisymmetric vortices shed from the cylindrical ring augments the heat transfer at the downstream region of the ring. The maximum Nusselt number becomes large with decreasing the width-to-height ratio of the ring as well as with increasing Reynolds number. At the same time, the axial position where Nusselt number takes the maximum value moves upstream with these parameters. The heat transfer characteristics may be attributed to the change of the properties of shedding vortices, such as their scale and intensity of vorticity fluctuation.