Inscrição na biblioteca: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

THERMAL PERFORMANCE OF LONGITUDINALLY FINNED SURFACES

Get access (open in a dialog) DOI: 10.1615/IHTC7.3680
pages 565-570

Resumo

To enhance the heat transfer of a surface it is customary to use large fins made of material of high thermal conductivity or, where the quantity of the material or its physical properties incur penalties for some applications, such as nuclear reactor fuel elements, to use turbulence promoters such as transverse ribs on the surface.
An alternative method of enhancing heat transfer is to apply a large number of longitudinal fins of low height. With such fins the surface perimeter can be considerably increased and the temperature drop through them kept adequately small.
Pins have been manufactured with longitudinal fins on the outside and their heat transfer and pressure drop characteristics measured in smooth channels of different diameter over a range of turbulent Reynolds numbers in longitudinal flow. The results have been transformed to the fully rough situation, by removing the influence of the smooth channels, and compared with results for transverse ribs.