This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Investigation of the Effect of Tire Deformation on Open-Wheel Aerodynamics
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
This paper introduces a finite element (FE) approach to determine tire deformation and its effect on open-wheeled racecar aerodynamics. In recent literature tire deformation was measured optically. Combined loads like accelerating at corner exit are difficult to reproduce in wind tunnels and requires several optical devices to measure the tire deformation. In contrast, an FE approach is capable of determining the tire deformation in combined load states accurately. The FE tire model was validated using computer tomography images, 3D scan measurements, contact patch measurements and stiffness measurements. The deformed shape of the FE model was used in a computational fluid dynamics (CFD) simulation. A sensitivity study was created to determine the effect of the tire deformation on aerodynamics for unloaded and loaded tires. In addition, the influence of these tire deformations was investigated in a CFD study using a full vehicle model. The CFD model was validated through full scale wind tunnel tests as well as on-road tests. Finally, a straight-line and a steady state cornering maneuver based on a vehicle dynamics simulation were simulated using this combined approach of FE and CFD. The tire deformation included proper wheel load, wheel speed and slip angle for each wheel. The CFD full vehicle model took chassis slip angle, body roll angle and wheel steering angle into account in order to match the real driving situation. The results show that realistic tire deformations provide better insight into the effect of rotating wheels on aerodynamics of full vehicles, especially that of race cars.
CitationEder, P., Gerstorfer, T., Lex, C., and Amhofer, T., "Investigation of the Effect of Tire Deformation on Open-Wheel Aerodynamics," SAE Technical Paper 2020-01-0546, 2020, https://doi.org/10.4271/2020-01-0546.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
- Landstrom, C., Josefsson, L., Walker, T., and Lofdahl, L. , “Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car,” SAE Int. J. Passeng. Cars - Mech. Syst 5(1):136-151, 2012, https://doi.org/10.4271/2012-01-0169.
- Ogawa, A., Takiguchi, T., Yano, S., Nakamura, S. et al. , “Development Methodologies in Formula One Aerodynamics,” Honda R & D Technical Review, 2009.
- Wickern, G., Zwicker, K., and Pfadenhauer, M. , “Rotating Wheels - Their Impact on Wind Tunnel Test Techniques and on Vehicle Drag Results,” SAE Technical Paper 970133 , 1997, https://doi.org/10.4271/970133.
- Hobeika, T. and Sebben, S. , “Tyre Pattern Features and Their Effects on Passenger Vehicle Drag,” SAE Int. J. Passeng. Cars - Mech. Syst 11(5):401-413, 2018, https://doi.org/10.4271/2018-01-0710.
- Sprot, A.J., Sims-Williams, D.B., and Dominy, R.G. , “The Aerodynamic Characteristics of a Fully Deformable Formula One Wind Tunnel Tyre,” SAE Int. J. Passeng. Cars-Mech. Syst. 5(2):1026-1041, 2012, https://doi.org/10.4271/2012-01-1166.
- Waltz, M. , “Dynamisches Verhalten Von Gummigefederten Eisenbahnrädern,” Dissertation, Fakultät für Maschinenwesen, RWTH Aachen, 2005.
- Krmela, J. , Tire Casings and Their Material Characteristics for Computaional Modeling (Scientific Monograph, 2017). ISBN:978-83-63978-62-4.
- Yang, X., Olatunbosun, O., and Bolarinwa, E. , “Materials Testing for Finite Element Tire Model,” SAE Int. J. Mater. Manuf 3(1):211-220, 2010, https://doi.org/10.4271/2010-01-0418.
- Duncan, B., Kandasamy, S., Sbeih, K., Lounsberry, T. et al. , “Further CFD Studies for Detailed Tires using Aerodynamics Simulation with Rolling Road Conditions,” SAE Technical Paper 2010-01-0756 , 2010, https://doi.org/10.4271/2010-01-0756.