NUMERICAL SIMULATION OF THERMO-HYDRAULIC PERFORMANCE OF SOLAR AIR HEATER CHANNEL-TYPE WITH PERFORATED DWLS
Palavras-chave:
vortex generators, solar air-heater, perforated delta winglets, longitudinal vortices, computational fluid dynamicsResumo
The present work numerically investigates the effect of perforated area of DWL pairs in
common-flow-down arrangements mounted in a solar air heater channel-type on thermo-hydraulic
performance of the channel. The flow is considered laminar, steady and incompressible. The three-
dimensional numerical simulations are performed by using the Finite Volume Method. The imposed
inlet velocity to run the numerical simulations is 0.15737 m/s, corresponding to Reynolds number of
500 (based on the hydraulic diameter). The angle of attack is kept constant and equal to 30o, and the
aspect ratio of the DWLs is 1.9. Results show that, depending on the perforated areas, the friction
factor decreases about 8% in relation to a standard DWL pair whereas the useful heat gain increases
about 3%. Finally, the flow field and heat transfer characteristics are investigated and the main results
are discussed.
