Predicting Automobile Aerodynamic Characteristics Using an iterative Viscous/Potential Flow Technique 830303
An iterative viscous/potential flow calculation method is described in this paper. A potential-flow panel method is coupled with integral boundary layer methods. Simple linear doublet sheets are used to enclose the low-energy separated-flow region of the wake. Calculations for various body shapes demonstrate that unseparated flow pressure distributions are accurately calculated. Body lift trends are also properly computed for a simple body with separation only at the base and in close ground proximity. However, the prediction of average base pressure is only partially successful. The base pressures for a limited number of geometries, which include a Porsche 924, are properly predicted, but calculations for other shapes indicate that the separated-flow wake model must be improved for general body shapes.
Citation: Summa, J. and Maskew, B., "Predicting Automobile Aerodynamic Characteristics Using an iterative Viscous/Potential Flow Technique," SAE Technical Paper 830303, 1983, https://doi.org/10.4271/830303. Download Citation
Author(s):
J. Michael Summa, Brian Maskew
Affiliated:
Analytical Methods, Inc., Redmond, WA
Pages: 20
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Pressure
Aerodynamics
Logistics
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