Influence of afterbody rounding on the near wake of fastback vehicle

Giacomo Rossitto (1, 2) , Christophe Sicot (2) , Valérie Ferrand (3) , Jacques Borée (2) , Fabien Harambat (1)

1 PSA - PSA Peugeot Citroën
2 PPrime [Poitiers] - Institut Pprime [UPR 3346]
3 DAEP - Département Aérodynamique Energétique et Propulsion

Experimental and numerical analyzes were performed to investigate the aerodynamic performances of a realistic vehicle with different afterbody rounding. Rounding the side pillars generated moderate changes in drag and important lift reductions. The minor effect on the drag force was found to result from opposite drag effects on the slanted and vertical surfaces. The vorticity distribution in the near wake was also analyzed to understand the flow field modifications due to afterbody rounding.

Mots clés: PIV; Drag reduction; Wake analysis; Rounded edges

Domaines: Autre

Giacomo Rossitto, Christophe Sicot, Valérie Ferrand, Jacques Borée, Fabien Harambat. Influence of afterbody rounding on the near wake of fastback vehicle. 18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, Jul 2016, Lisbon, Portugal. pp. 1399-1407. ⟨hal-01462934⟩