THERMAL-HYDRAULIC PEFORMANCE OF WING INSERT FOR DESIGNING COMPACT TUBULAR HEAT EXCHANGER

Abstract

Enhanced tube by employing double-sided delta wing vortex generator with alternate axes (DW-AA) was investigated　to observe thermal-hydraulic performance in the form of Nusselt number (Nu) and friction factor (f). DW-AA was examined for a given wing-width ratio (wr) of 0.47 and 0.63 with varied Reynolds number (Re) of 5,300 up to 14,500. A sophisticated performance was shown by the present configuration which revealed a high Nu and thermal performance (ƞ) with a reasonable increase of f among of all cases. The highest ƞ was in the value of 1.33. Additionally, a high value of wr offered the highest performance.