Influence of fin spacing and rotational speed on the convective heat exchanges from a rotating finned tube

被引：18
|
作者：
Watel, B
Harmand, S
Desmet, B
机构：
[1] CEA Grenoble, CRT, GRETH, F-38054 Grenoble 9, France
[2] Univ Valenciennes & Hainaut Cambresis, ENSIMEV, Lab Mecan Energet, LAMIH, F-59304 Valenciennes, France
来源：
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW | 2000年 / 21卷 / 02期
关键词：
heat transfer; natural convection; forced convection; rotating fins; annular fins; fin spacing;
D O I：
10.1016/S0142-727X(99)00070-3
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The convective heat transfer from fins to air at rest has been evaluated for rotating annular fins. The fin cooling is studied using infrared thermography. The heat transfer coefficient can be obtained from a fin's thermal balance, during its cooling process and its temperature-time evolution. The influence of the fin rotational speed and the fin spacing on the convective exchanges is studied. The tests were carried out for rotational Reynolds numbers (based on the shaft diameter and the shaft peripheral speed) ranging from 400 to 30 000, for different fin spacings. A. correlation of the experimental data has been found. The relative influences of the rotational forced convection and the gravitational natural convection on the heat transfer from the fin surface have also been analyzed. (C) 2000 Elsevier Science Inc. All rights reserved.
引用
收藏
页码：221 / 227
页数：7
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