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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

LOCAL CONTROL OF IMPINGING JET HEAT TRANSFER BY AN ARRAY OF CIRCULAR CYLINDERS

Get access (open in a dialog) DOI: 10.1615/IHTC9.1780
pages 203-208

Abstract

Local control with augmentation of jet impingement heat transfer was investigated by inserting an array of circular cylinders in a two-dimensional jet stream impinging normally on a large flat plate. The central stagnation-line heat transfer was augmented most effectively due to the acceleration and turbulence effects when the cylinder array was placed between four and six cylinder diameters upstream of the heat transfer surface by the 'passing' arrangement. The 'blocking' arrangement shifted the maximal point of heat transfer to half of the cylinder pitch off the jet axis. The lateral distribution of heat transfer was able to be controlled by changing the axial location and arrangement of the cylinder array. The augmentation of stagnation-line heat transfer was described well with the surface renewal parameter defined in the approaching stream.