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Cambered Airfoil in Ground Effect - An Experimental and Computational Study
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English
Abstract
A critical aspect of the performance of the front wing of a Formula One or Indy race car is studied by idealizing it as a negatively cambered two-dimensional airfoil operating in ground effect and determining the fiowfield at various heights. When the airfoil operates at heights roughly equal to the airfoil thickness, significant negative lift is generated. As the height is decreased, there is an expected downforce reduction.
The primary objective of this work is to elucidate the force reduction phenomena for the specific case of an inverted NACA 4412 airfoil traveling at high Reynolds number above ground in still air. This is the road condition. The secondary objective is to compare and contrast the fiowfield about this airfoil in road conditions and when operating in the wind tunnel environment, i.e. when the airfoil and the ground are not moving relative to each other.
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Citation
Ranzenbach, R. and Barlow, J., "Cambered Airfoil in Ground Effect - An Experimental and Computational Study," SAE Technical Paper 960909, 1996, https://doi.org/10.4271/960909.Also In
Vehicle Aerodynamics: Wind Tunnels, Cfd, Aeroacoustics, and Ground Transportation Systems
Number: SP-1145; Published: 1996-02-01
Number: SP-1145; Published: 1996-02-01
References
- Ranzenbach, R.C. Barlow, J.B. “Two-Dimensional Airfoil in Ground Effect, An Experimental and Computational Study,” SAE paper 942509 1994
- Chen, H.C. Korpus, R. “A Multi-block Finite-Analytic Reynolds-Averaged Navier-Stokes Method for 3D Incompressible Flows,” ASME Summer Fluid Dynamic Conference 1993
- Chen, C.J. Chen, H.C. “Finite Analytic Method for Unsteady Two-Dimensional Navier-Stokes Equations,” Journal of Computational Physics 53 209 226 1984
- Ranzenbach, R.C. Barlow, J.B. “Cambered Airfoil in Ground Effect- Wind Tunnel and Road Conditions,” AIAA paper # 95-1909 1995
- Scibor-Rylski, A.J. “Road Vehicle Aerodynamics,” John Wiley & Sons New York 1984
- Chen, H.C. Patel, V.C. “Near-Wall Turbulence Models for Complex Flows Including Separation,” AIAA Journal 26 4 641 648 1988
- Hanjalic, K. Launder, B.E. “Sensitizing the Dissipation Equation to Irrotational Strains Journal of Fluids Engineering 102 34 1980
- Chen, H.C. Patel, V.C. Ju, S. “Solutions of Reynolds-Averaged Navier-Stokes Equations for Three-Dimensional Incompressible Flows,” J. Computational Physics 88 2 305 336
- Weems, K. Korpus, R. Fritts, M. “RANS/Potential Flow Coupling, Gridding improvements, Wake and Vorticity Transport Validation,” SAIC-93/1121 1993 Science Applications International Corporation Annapolis MD
- LaBozzetta, W. et. al. “The Interactive Graphics for Geometry Generation Program (I3G),” Wright Research and Development Center Configuration Data Management System AFWAL-TR-88-117 Eglin Air Force Base, FL 1988
- Wozniak, R. “Development of a Two-Dimensional Insert,” GLMWT Report 1993