NATURAL-CONVECTION HEAT-TRANSFER ON FINNED TUBES IN AIR

被引：46

作者：

HAHNE, E ^{[1
]}

ZHU, D ^{[1
]}

机构：

[1] TSING HUA UNIV,DEPT ENGN MECH,BEIJING,PEOPLES R CHINA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1994年 / 37卷

关键词：

D O I：

10.1016/0017-9310(94)90009-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In an experimental investigation temperature fields and mean heat transfer coefficients were obtained on a finned tube. The diameter of the fin was varied in order to find out about the effect of fin height. Such an effect on the heat transfer coefficient vanishes in a correlation given in the literature. By thermovision the usefulness of the fins can be observed: the smaller fin proved to be better than the larger one under given conditions. The heat transfer coefficient depends on fin height, with better heat transfer for smaller fins. The respective correlation based on thermovisually obtained fin temperatures is presented. For the more practical case, with the Grashof number being based on the temperature difference between central tube and ambient air, an improved correlation is presented with less than 6% scatter.

引用

页码：59 / 63

页数：5