A 3D numerical simulation based on the lattice Boltzmann method is carried out on a simplified car geometry (initially proposed by Ahmed, Ramm, and Falting, 1984, SAE Technical Paper series No. 840300) to analyze and establish a method for controlling the near-wake flow topology of a generic blunt body model. The results indicate the existence of a complex flow topology consisting of transverse and longitudinal vortices emanating from flow separations that occur on the top and the lateral edges of the slanted rear window, respectively. The topology of each structure is detailed and the numerical results are compared with the experimental results in the literature. The results presented in this paper can then be used to develop and parametrize active control solutions conducive to improving the aerodynamic performances of automobile vehicles.
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e-mail: mathieu.roumeas@yahoo.fr
e-mail: patrick.gillieron@renault.com
e-mail: kourta@imft.fr
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February 2008
Research Papers
Separated Flows Around the Rear Window of a Simplified Car Geometry
Mathieu Rouméas,
e-mail: mathieu.roumeas@yahoo.fr
Mathieu Rouméas
Groupe “Mécanique des Fluides et Aérodynamique,”
Direction de la Recherche Renault, 1 Avenue du Golf (TCR AVA 058), 78288 Guyancourt, France
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Patrick Gilliéron,
e-mail: patrick.gillieron@renault.com
Patrick Gilliéron
Groupe “Mécanique des Fluides et Aérodynamique,”
Direction de la Recherche Renault, 1 Avenue du Golf (TCR AVA 058), 78288 Guyancourt, France
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Azeddine Kourta
e-mail: kourta@imft.fr
Azeddine Kourta
Institut de Mécanique des Fluides de Toulouse
, Groupe EMT2, Avenue du Professeur Camille Soula, 31400 Toulouse, France
Search for other works by this author on:
Mathieu Rouméas
Groupe “Mécanique des Fluides et Aérodynamique,”
Direction de la Recherche Renault, 1 Avenue du Golf (TCR AVA 058), 78288 Guyancourt, Francee-mail: mathieu.roumeas@yahoo.fr
Patrick Gilliéron
Groupe “Mécanique des Fluides et Aérodynamique,”
Direction de la Recherche Renault, 1 Avenue du Golf (TCR AVA 058), 78288 Guyancourt, Francee-mail: patrick.gillieron@renault.com
Azeddine Kourta
Institut de Mécanique des Fluides de Toulouse
, Groupe EMT2, Avenue du Professeur Camille Soula, 31400 Toulouse, Francee-mail: kourta@imft.fr
J. Fluids Eng. Feb 2008, 130(2): 021101 (10 pages)
Published Online: January 24, 2008
Article history
Received:
July 27, 2006
Revised:
August 30, 2007
Published:
January 24, 2008
Citation
Rouméas, M., Gilliéron, P., and Kourta, A. (January 24, 2008). "Separated Flows Around the Rear Window of a Simplified Car Geometry." ASME. J. Fluids Eng. February 2008; 130(2): 021101. https://doi.org/10.1115/1.2829566
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