Aerodynamics of High-Lift Wings with Ground Effect for Racecars

Paper #:
  • 2008-01-0656

Published:
  • 2008-04-14
DOI:
  • 10.4271/2008-01-0656
Citation:
Mokhtar, W., "Aerodynamics of High-Lift Wings with Ground Effect for Racecars," SAE Technical Paper 2008-01-0656, 2008, doi:10.4271/2008-01-0656.
Abstract:

The aerodynamics of a finite-span rectangular wing is investigated using a numerical method. A high-lift single element airfoil section is used. The study focuses on the effect of the ground clearance (the vertical distance between the leading edge of the wing and the ground). The study includes the effect on the overall characteristics of the flow around the wing and the generated aerodynamic forces (down force and drag). Two wings are used in the study with and without end plates. The CFD code “STAR CCM+” is used in the study. The study showed that there is a range of ground clearance where it has a strong effect on the wing behavior. That effective range was the same for wings with and without end plates. At a small ground clearance, the down force can be easily doubled by small change in the clearance. However, the use of a high lift airfoil section increases the interaction with the ground boundary layer and may cause a decrease in the generated down force.

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