OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

WAKE STRUCTURE AND DRAG OF VEHICLES WITH ROUNDED REAR EDGES

Rossitto, Giacomo and Sicot, Christophe and Ferrand, Valérie and Borée, Jacques and Harambat, Fabien WAKE STRUCTURE AND DRAG OF VEHICLES WITH ROUNDED REAR EDGES. (2015) In: Proceedings of 50h 3AF International Conference on Applied Aerodynamics, 29 March 2015 - 1 April 2015 (Toulouse, France).

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
695kB

Abstract

The wake structure at the rear of road vehicle is known to be of prime importance in aerodynamics performances [3]: about 30% of the total pressure drag derives from the rear end of the vehicle. While production vehicle present significant curvature at the rear end, most of fundamental aerodynamic analyses were carried out around simplified car models presenting sharp edges at the rear. Since recently, very few papers addressed the question of rear edges curvature in aerodynamics performances. Thacker et al. Showed that rounding the edge between the end of the roof and the rear slant suppressed the separation over the rear window and resulted in 10% drag reduction. Fuller et al.Studied the effect on spatial stability and intensity of the pillar vortex when rounding the side rear pillars. For both of these works, the analysis was focused on the flow behaviour over the rear window: the impact of the rear end rounding on the near wake topology was not discussed. The current study aims to understand how the use of rounded pillars with respect to sharp edges modifies the flow field (over the body surface and in the near wake) and hence the global drag. Moreover, an “academic” and an “industrial” model will be characterized to discuss the applicability of simplified models to simulate properly the sensitivity of pillars rounding.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université de Poitiers (FRANCE)
Other partners > PSA Peugeot Citroën (FRANCE)
Laboratory name:
Statistics:download
Deposited By: Valérie Ferrand
Deposited On:25 Jan 2016 14:20

Repository Staff Only: item control page