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On the Aerodynamic Interference Due to the Rolling Wheels of Passenger Cars
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1991 by SAE International in United States
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Wind tunnel tests were carried out with a full-scale passenger car over a moving belt. The suspension system of the vehicle was redesigned in such a way that drag and lift forces could be measured whilst the wheels were rolling on the moving ground. The measurements were carried out with an internal balance installed inside the vehicle. Additionally, total-pressure-deficit contour plots were reduced from wake-rake measurements behind the front and rear wheels in order to identify the origin of different bound vortices generated at the wheels. It was found from these tests that rolling wheels have a large aerodynamic influence on passenger cars. They decrease the drag and increase the lift forces in comparison to fixed wheels. This has been established in an absolute and a relative sense by investigating different vehicle configurations.
- H. Berneburg - Technical Development Center of General Motors Europe Rüsselsheim, Germany
- H. J. Emmelmann - Technical Development Center of General Motors Europe Rüsselsheim, Germany
- E. Mercker - German-Dutch Wind Tunnel (DNW) Emmeloord, The Netherlands
- N. Breuer - German-Dutch Wind Tunnel (DNW) Emmeloord, The Netherlands
CitationMercker, E., Breuer, N., Berneburg, H., and Emmelmann, H., "On the Aerodynamic Interference Due to the Rolling Wheels of Passenger Cars," SAE Technical Paper 910311, 1991, https://doi.org/10.4271/910311.
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