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An Analytical Approach to Improve Drag Control Techniques for the Ahmed Body

[+] Author Affiliations
Charles-Henri Bruneau, Delphine Depeyras, Iraj Mortazavi

IMB Université de Bordeaux, Talence, France

Emmanuel Creusé

UST Lille, Villeneuve d’Ascq, France

Patrick Gilliéron

RENAULT - DREAM/DTAA, Guyancourt, France

Paper No. AJK2011-23032, pp. 1025-1031; 7 pages
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME


The vortices generated behind a simplified vehicle induce presssure forces at the back wall that contribute to a significant part of the drag coefficient. The study shows the strong relationship between the distance of the vortices to the back wall and these pressure forces. In particular, control process can modify the trajectory of the vortices to accelerate their removal from the wall and consequently reduce the drag coefficient.

Copyright © 2011 by JSME



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