Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger

被引：73
|
作者：
Allison, C. B. [1 ]
Dally, B. B. [1 ]
机构：
[1] Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 25-26期
关键词：
compact tube-fin heat exchanger; delta-winglet vortex generator;
D O I：
10.1016/j.ijheatmasstransfer.2007.08.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The experimental analysis of the effects of delta-winglet vortex generators on the performance of a fin and tube radiator is presented. The winglets were arranged in flow-up configuration, and placed directly upstream of the tube. This is a hitherto untested configuration, but is thought to have certain advantages. In addition to vortex generation the flow is guided onto the tube surface increasing the localised velocity gradients and Nusselt numbers in this region. The study includes dye visualisation and full scale heat transfer performance measurements. The results are compared to a standard louvre fin surface. It was found that the winglet surface had 87% of the heat transfer capacity but only 53% of the pressure drop of the louvre fin surface. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5065 / 5072
页数：8
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