| Title |
Performance Evaluation in Fin-Tube Heat Exchanger by Tow-In Winglet Pairs |
| Keywords |
Tow-in winglet vortex generator ; Tow-in형상의 와류발생기 ; Fin-tube heat exchanger ; 핀-관 열교환기 ; Pressure-drop reduction ; 압력강하 감소 ; Heat transfer enhancement ; 열전달 촉진 |
| 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 winglet 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. |