Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

FIN EFFECT AND RADIATIVE HEAT TRANSFER OF THE UNHEATED REGION OF AN ASYMMETRICALLY HEATED TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC8.1400
pages 2873-2878

Abstrakt

The heat transfer rate in an asymmetrically heated tube is enhanced by heat conduction within the tube wall, i.e. the fin effect of the unheated region. The fin effects of the unheated regions on heat transfer rates and the temperature distributions of circumferentially partially heated tubes were numerically obtained for this paper; the flow in a tube was assumed to be turbulent and the radiation from the tube wall was taken into account. The circumferential heat conduction within the wall, the radiative heat exchange between walls and the size of the heated region were seen to affect the fin efficiency of the unheated region.
Without radiative heat transfer, the unheated region of the asymmetrically heated tube can be considered to be a straight fin which has a constant thickness and height. The fin efficiency of the unheated region is increased with the radiative heat transfer of the wall.