IDENTIFICATION OF EFFICIENT FLOW CONTROL STRATEGIES FOR TRUCK MODEL DRAG REDUCTION
Résumé
This study presents the modifications produced in the controlled wake of a square-back blunt truck model using unsteady pulsed jets combined with small flaps, and the corresponding mean base pressure changes. Different control strategies obtained using different locations of the pulsed jets around the model base are considered. A base pressure increase is obtained for a variety of control strategies implying one to four edges used in a synchronized manner. The vertically-asymmetric forcing excluding the bottom edge results in 33% increase of the mean base pressure and 28% reduction of the wake length with a reduced energetic cost with respect to the forcing strategy involving the four model edges. This control strategy also proves to be efficient in yawed configurations (5 °).
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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