Performance enhancement of fin and tube heat exchanger employing curved trapezoidal winglet vortex generator with circular punched holes
نویسندگان
چکیده
Vortex generation is a potential passive technology for increasing the heat transfer rate in air side of fin and tube exchangers (FTHEs). This study proposes novel configurations curved trapezoidal winglet vortex generator (CTWVG) with without circular holes to improve FTHEs. As per literature, streamlined form demonstrates high enhancement low flow loss pressure drop. But still, different design are possible augment characteristics CTWVG further. The current investigates (i.e., hole, 1 2 holes, 3 6 holes). A three-dimensional computational model utilized evaluate thermal-hydraulic efficiency FTHEs fitted CTWVGs or Reynolds numbers ranging from 400 2000. common flow-down configuration tubes array used reduce wake region. thermo-hydraulic performance structure FTHE four inline compared VG holes. Pressure drop (ΔP), Nusselt number (Nu), friction factor (f), Colburn (j), London area goodness (j/f) comparison. Results show that punched has an impact on performance, which measured using dimensionless as evaluation criteria (j/jo)/(f/fo)). significantly increase FTHE's performance. results indicate resistance reduced all cases no hole) minor decrease number. six performs better than other configurations. At 2000, enhanced by 75.25% 40.10%; increased 107.88% 125.51%, respectively. On hand, 8.1% reported literature [48,54]. HTPF 30.96% (compared rectangular [48]) 27.69% [54]) respect values literature. (LAGF) been 275% Modi et al. [48].
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2023
ISSN: ['1879-2189', '0017-9310']
DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2023.124142