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|Title:||Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger|
|Citation:||International Journal of Heat and Mass Transfer, 2007; 50(25-26):5065-5072|
|Publisher:||Pergamon-Elsevier Science Ltd|
|C.B. Allison and B.B. Dally|
|Abstract:||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.|
|Keywords:||Delta-winglet vortex generator; Compact tube–fin heat exchanger|
|Description:||Copyright © 2007 Elsevier Ltd All rights reserved.|
|Appears in Collections:||Mechanical Engineering publications|
Environment Institute publications
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