Interaction effects between parameters in a flat-tube louvered fin compact heat exchanger with delta-winglets vortex generators

2015 ◽  
Vol 91 ◽  
pp. 1092-1105 ◽  
Author(s):  
Daniel Jonas Dezan ◽  
Leandro Oliveira Salviano ◽  
Jurandir Itizo Yanagihara
Keyword(s):  
Heat Exchanger ◽  
Interaction Effects ◽  
Vortex Generators ◽  
Compact Heat Exchanger ◽  
Flat Tube ◽  
Louvered Fin

Interaction effects between parameters in a vortex generator and louvered fin compact heat exchanger

2014 ◽  
Vol 77 ◽  
pp. 247-256 ◽  
Author(s):  
Bernd Ameel ◽  
Joris Degroote ◽  
Henk Huisseune ◽  
Jan Vierendeels ◽  
Michel De Paepe
Keyword(s):  
Heat Exchanger ◽  
Vortex Generator ◽  
Interaction Effects ◽  
Compact Heat Exchanger ◽  
Louvered Fin

Performance enhancement of a louvered fin heat exchanger by using delta winglet vortex generators

2013 ◽  
Vol 56 (1-2) ◽  
pp. 475-487 ◽  
Author(s):  
Henk Huisseune ◽  
Christophe T’Joen ◽  
Peter De Jaeger ◽  
Bernd Ameel ◽  
Sven De Schampheleire ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Performance Enhancement ◽  
Vortex Generators ◽  
Louvered Fin ◽  
Delta Winglet

The Effectiveness of Secondary Flow Produced by Vortex Generators Mounted on Both Surfaces of the Fin to Enhance Heat Transfer in a Flat Tube Bank Fin Heat Exchanger

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Ke-Wei Song ◽  
Liang-Bi Wang
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Heat Exchanger ◽  
Convective Heat Transfer ◽  
Secondary Flow ◽  
Average Nusselt Number ◽  
Vortex Generators ◽  
Tube Bank ◽  
Flat Tube ◽  
Flow Intensity

Secondary flow is the flow in the cross section normal to the main flow. It plays an important role on the enhanced heat transfer and in the applications in other fields. Secondary flow can greatly enhance the convective heat transfer. In order to find the effectiveness of secondary flow for heat transfer enhancement, a nondimensional parameter, Se, based on the absolute vorticity flux is reported to specify the intensity of secondary flow. Its physical meaning is the ratio of inertial force to viscous force induced by secondary flow. As an example, the effectiveness of secondary flow was numerically studied for a flat tube bank fin heat exchanger with vortex generators (VGs) mounted on both surfaces of the fin. The contributions of VGs are investigated for the enhancements of secondary flow intensity, convective heat transfer, and pressure drop. The method is demonstrated using Se to find out the optimum configurations of VGs. The results reveal that close relationships exist not only between the span-average nondimensional intensity of secondary flow and the span-average Nusselt number but also between the volume average nondimensional intensity of secondary flow and the overall average Nusselt number. For the configuration studied, a ratio of Nusselt number enhancement to the friction factor enhancement increases with increasing the enhancement of secondary flow intensity. As a supplement to traditional criteria on a good performance heat transfer surface, the nondimensional intensity of secondary flow can be used clearly for an optimum value of VG parameter.

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