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Numerical study of a round tube heat exchanger with louvered fins and delta winglets

Henk Huisseune (UGent) , Christophe T'Joen (UGent) , Peter De Jaeger (UGent) , Bernd Ameel (UGent) and Michel De Paepe (UGent)
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Abstract
Louvered fin and round tube heat exchangers are widely used in air conditioning devices and heat pumps. In this study the effect of punching delta winglet vortex generators in the louvered fin surface is studied numerically. The delta winglets are located in a common-flow-down orientation behind each tube of the staggered tube layout. It is shown that the generated vortices significantly reduce the size of the tube wakes. Three important heat transfer enhancement mechanisms can be distinguished: a better flow mixing, boundary layer thinning and a delay in flow separation from the tube surface. The compound heat exchanger has a better thermal hydraulic performance then when only louvers or only delta winglets are used. Comparison to other enhanced fin designs clearly shows its potential, especially for low Reynolds number applications.
Keywords
VORTEX GENERATORS, TRANSFER ENHANCEMENT, PERFORMANCE, FLOW

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Citation

Please use this url to cite or link to this publication:

Chicago
Huisseune, Henk, Christophe T’Joen, Peter De Jaeger, Bernd Ameel, and Michel De Paepe. 2012. “Numerical Study of a Round Tube Heat Exchanger with Louvered Fins and Delta Winglets.” In Journal of Physics Conference Series, ed. Daniel Petit and Christophe Le Niliot. Vol. 395. Editions Société Française de Thermique.
APA
Huisseune, H., T’Joen, C., De Jaeger, P., Ameel, B., & De Paepe, M. (2012). Numerical study of a round tube heat exchanger with louvered fins and delta winglets. In D. Petit & C. Le Niliot (Eds.), Journal of Physics Conference Series (Vol. 395). Presented at the 6th European Thermal Sciences Conference (Eurotherm), Editions Société Française de Thermique.
Vancouver
1.
Huisseune H, T’Joen C, De Jaeger P, Ameel B, De Paepe M. Numerical study of a round tube heat exchanger with louvered fins and delta winglets. In: Petit D, Le Niliot C, editors. Journal of Physics Conference Series. Editions Société Française de Thermique; 2012.
MLA
Huisseune, Henk, Christophe T’Joen, Peter De Jaeger, et al. “Numerical Study of a Round Tube Heat Exchanger with Louvered Fins and Delta Winglets.” Journal of Physics Conference Series. Ed. Daniel Petit & Christophe Le Niliot. Vol. 395. Editions Société Française de Thermique, 2012. Print.
@inproceedings{2984038,
  abstract     = {Louvered fin and round tube heat exchangers are widely used in air conditioning devices and heat pumps. In this study the effect of punching delta winglet vortex generators in the louvered fin surface is studied numerically. The delta winglets are located in a common-flow-down orientation behind each tube of the staggered tube layout. It is shown that the generated vortices significantly reduce the size of the tube wakes. Three important heat transfer enhancement mechanisms can be distinguished: a better flow mixing, boundary layer thinning and a delay in flow separation from the tube surface. The compound heat exchanger has a better thermal hydraulic performance then when only louvers or only delta winglets are used. Comparison to other enhanced fin designs clearly shows its potential, especially for low Reynolds number applications.},
  articleno    = {012050},
  author       = {Huisseune, Henk and T'Joen, Christophe and De Jaeger, Peter and Ameel, Bernd and De Paepe, Michel},
  booktitle    = {Journal of Physics Conference Series},
  editor       = {Petit, Daniel and Le Niliot, Christophe},
  isbn         = {9782905267849},
  issn         = {1742-6588},
  keyword      = {VORTEX GENERATORS,TRANSFER ENHANCEMENT,PERFORMANCE,FLOW},
  language     = {eng},
  location     = {Poitiers, France},
  pages        = {8},
  publisher    = {Editions Soci{\'e}t{\'e} Fran\c{c}aise de Thermique},
  title        = {Numerical study of a round tube heat exchanger with louvered fins and delta winglets},
  url          = {http://dx.doi.org/10.1088/1742-6596/395/1/012050},
  volume       = {395},
  year         = {2012},
}

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