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Performance Evaluation in Fin-Tube Heat Exchanger by Tow-In Winglet Pairs  

Kahoru Torii (영남대학교 부설 공업기술연구소)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.15, no.2, 2003 , pp. 87-94 More about this Journal
Abstract
To reduce the air side pressure drop in air-cooled heat exchanger, tow-in type winglet vortex generators are applied. A specially designed multiple-channel test core was used in the experiments for the various geometry of winglet vortex generators. The proposed tow-in type vortex generator gives significant separation delay, reduces form drag, and removes the zone of poor heat transfer from near-wake of the tubes. The results show the significant pressure drop reduction for the tow-in win91e1 vortex generators with the similar enhancement of the heat transfer as other vortex generator applications in heat exchanger. In the range of Reynolds number of 350 to 2100 the pressure drop decrease 8∼15% and 34∼55% for the in-line and staggered tube banks, respectively, compared to those without vortex generators.
Keywords
Tow-in winglet vortex generator; Fin-tube heat ex-changer; Pressure-drop reduction; Heat transfer enhancement;
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