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Impact des générateurs de tourbillons de type aile-delta sur la performance thermique d'un échangeur de chaleur à tubes plats à ailettes persiennes.

Impact of leading edge delta-wing vortex generators on the thermal performance of a flat tube, louvered-fin compact heat exchanger.

Auteurs : JOARDAR A., JACOBI A. M.

Type d'article : Article

Résumé

The effectiveness of delta-wing type vortex generators is experimentally evaluated by full-scale wind-tunnel testing of a compact heat exchanger typical to those used in automotive systems. The mechanisms important to vortex enhancement methods are discussed, and a basis for selecting a delta-wing design as a vortex generator is established. The heat transfer and pressure drop performance are assessed at full scale under both dry- and wet-surface conditions for a louvered-fin baseline and for a vortex-enhanced louvered-fin heat exchanger. An average heat transfer increase over the baseline case of 21% for dry conditions and 23.4% for wet conditions was achieved with a pressure drop penalty smaller than 7%. Vortex generation is proven to provide an improved thermal-hydraulic performance in compact heat exchangers for automotive systems.

Détails

  • Titre original : Impact of leading edge delta-wing vortex generators on the thermal performance of a flat tube, louvered-fin compact heat exchanger.
  • Identifiant de la fiche : 2006-0954
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 48 - n. 8
  • Date d'édition : 04/2005

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