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- Title
Flow compressibility effects around an open-wheel racing car.
- Authors
Keogh, J.; Doig, G.; Diasinos, S.
- Abstract
A numerical investigation has been conducted into the influence of flow compressibility effects around an open-wheeled racing car. A geometry was created to comply with 2012 Fl regulations. Incompressible and compressible CFD simulations were compared - firstly with models which maintained Reynolds number as Mach number increased, and secondly allowing Mach number and Reynolds number to increase together as they would on track. Results demonstrated significant changes to predicted aerodynamic performance even below Mach 015. While the full car coefficients differed by a few percent, individual components (particularly the rear wheels and the floor/ diffuser area) showed discrepancies of over 10% at higher Mach numbers when compressible and incompressible predictions were compared. Components in close ground proximity were most affected due to the ground effect. The additional computational expense required for the more physically-realistic compressible simulations would therefore be an additional consideration when seeking to obtain maximum accuracy even at low freestream Mach numbers.
- Subjects
RACING automobile design &; construction; COMPRESSIBILITY; NUMERICAL analysis; GEOMETRIC analysis; COMPUTATIONAL fluid dynamics
- Publication
Aeronautical Journal, 2014, Vol 118, Issue 1210, p1409
- ISSN
0001-9240
- Publication type
Article
- DOI
10.1017/S0001924000010125