1998-02-23

The Use of CFD to Predict the Aerodynamic Characteristics of Simple Automotive Shapes 980036

MIRA and Rover Group Ltd have undertaken a systematic study of the ability of CFD methods to predict the aerodynamic characteristics of simplified car-like shapes. This paper reports the latest stage of this investigation, which examines the use of a commercial Reynolds-averaged Navier-Stokes code (STAR-CD) to predict the aerodynamic characteristics of a series of simplified car shapes.
Comparable experimental data were obtained by testing in the MIRA Full Scale Wind Tunnel (FSWT).
This paper shows that CFD techniques are improving in their ability to predict flow separation from curved surfaces accurately. Further, encouraging results for vehicle drag (coefficients to within 2% of experiment) and the effect of limited geometric modifications on drag (within 7% of full-scale experiment) were obtained. However these latter results should be viewed with some caution as the results for lift were considerably poorer. Nevertheless, the utility of two-layer turbulence modeling is demonstrated along with the vital importance of using spatial discretisation schemes of at least second-order accuracy.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Computational Analysis of Flow Around a Simplified Vehicle-Like Body

930293

View Details

TECHNICAL PAPER

A Calibration Study of CFD for Automotive Shapes and CD

940323

View Details

TECHNICAL PAPER

A Systematic Approach to the Preliminary Aerodynamic Design of Enclosed-Wheel Racecars

2006-01-3662

View Details

X