Heat transfer enhancement of inclined projected winglet pair vortex generators with protrusions - Université d'Angers Accéder directement au contenu
Article Dans Une Revue International Journal of Thermal Sciences Année : 2018

Heat transfer enhancement of inclined projected winglet pair vortex generators with protrusions

Résumé

Heat transfer enhancement in parallel plate-fin heat exchanger is examined by performing three-dimensional numerical simulations of longitudinal vortex generators (VG) with protrusions. The turbulence is modeled using the shear-stress transport (SST) κ-ω model and validated with correlations and experimental data at Reynolds number equal to 4600. Hemi-spherical protrusions are inserted downstream two VG configurations: delta winglet type (DWP) and a new VG configuration named inclined projected winglet pair (IPWP), in various locations, leading to the definition of six different configurations. Based on the streamwise distribution of Nusselt number and friction coefficient criteria in addition to vorticity, the local performance is analyzed. Some VGs with protrusions are examined and show better performance relative to VGs standing alone. The present study highlights the different mechanisms involved in the convective heat transfer intensification by generating multiple interacting vortices while adding protrusions with low pressure drop penalty. Finally, it is found that the IPWP with protrusions, set downstream in the middle, bestows the best global performance with about 7.1% heat transfer enhancement compared to DWP configuration.
Fichier principal
Vignette du fichier
ijts_2018_oneissi.pdf (3.65 Mo) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-02527953 , version 1 (01-04-2020)

Identifiants

Citer

Mohammad Oneissi, Charbel Habchi, Serge Russeil, Thierry Lemenand, Daniel Bougeard. Heat transfer enhancement of inclined projected winglet pair vortex generators with protrusions. International Journal of Thermal Sciences, 2018, 134, pp.541-551. ⟨10.1016/j.ijthermalsci.2018.08.032⟩. ⟨hal-02527953⟩
56 Consultations
187 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More