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The Aerodynamic Development of the Tesla Model S - Part 2: Wheel Design Optimization
Technical Paper
2012-01-0178
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Aerodynamic efficiency plays an increasingly important role in the automotive industry, as the push for increased fuel economy becomes a larger factor in the engineering and design process. Longitudinal drag is used as the primary measure of aerodynamic performance, usually cited as the coefficient of drag (CD). This drag is created mostly by the body shape of the vehicle, but the wheel and tire system also contributes a significant portion. In addition to the longitudinal drag created by the body and wheels, rotational drag can add an appreciable amount of aerodynamic resistance to the vehicle as well. Reducing power consumption is an especially vital aspect in electric vehicle (EV) design. As the world's first luxury electric sedan, the Tesla Model S combines a premium driving experience with an electric drivetrain package that allows for unique solutions to many vehicle subsystems. The Model S has been developed from its inception with a focus on minimizing aerodynamic drag from all components. To that end, a wheel that reduces aerodynamic power loss was investigated. Exa's PowerFLOW CFD simulation software helped to expedite the design cycle, from force and moment values to qualitative flow visualization. PowerFLOW's proven Lattice-Boltzman solver and inherent transient nature provide accurate results and unique insight into the aerodynamic characteristics of each design not produced by other CFD solvers. The sliding mesh capability was also included to more closely represent the actual physics at work around the wheel. Ultimately, a new wheel was developed which greatly reduces aerodynamic power consumption.
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D'Hooge, A., Palin, R., Johnson, S., Duncan, B. et al., "The Aerodynamic Development of the Tesla Model S - Part 2: Wheel Design Optimization," SAE Technical Paper 2012-01-0178, 2012, https://doi.org/10.4271/2012-01-0178.Data Sets - Support Documents
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References
- Palin, R. Johnston, V. Johnson, S. D'Hooge, A. Duncan, B. Gargoloff, J.I. “The Aerodynamic Development of the Tesla Model S - Part 1: Overview,” SAE Technical Paper 2012-01-0177 2012 10.4271/2012-01-0177
- Fackrell, J.E. Harvey, J.K. “The Aerodynamics of an Isolated Wheel” Second AIAA Symposium on Aerodynamics of Sports and Competition Automobiles May 11 1974 Los Angeles, California
- Wäschle, A. Cyr, S. Kuthada, T. Wiedemann, J. “Flow around an Isolated Wheel - Experimental and Numerical Comparison of Two CFD Codes,” SAE Technical Paper 2004-01-0445 2004 10.4271/2004-01-0445
- Mears, A. Crossland, S. Dominy, R. “An Investigation into the Flow-Field About an Exposed Racing Wheel,” SAE Technical Paper 2004-01-0446 2004 10.4271/2004-01-0446
- Wäschle, A. “The Influence of Rotating Wheels on Vehicle Aerodynamics - Numerical and Experimental Investigations,” SAE Technical Paper 2007-01-0107 2007 10.4271/2007-01-0107
- Landström, C. Löfdahl, L. Walker, T. “Detailed Flow Studies in Close Proximity of Rotating Wheels on a Passenger Car,” SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 861 874 2009 10.4271/2009-01-0778
- 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 10.4271/2010-01-0756
- Elofsson, P. Bannister, M. “Drag Reduction Mechanisms Due to Moving Ground and Wheel Rotation in Passenger Cars,” SAE Technical Paper 2002-01-0531 2002 10.4271/2002-01-0531
- Wickern, G. Zwicker, K. Pfadenhauer, M. “Rotating Wheels - Their Impact on Wind Tunnel Test Techniques and on Vehicle Drag Results,” SAE Technical Paper 970133 1997 10.4271/970133
- Landström, C. Walker, T. Christoffersen, L. Löfdahl, L. “Influences of Different Front and Rear Wheel Designs on Aerodynamic Drag of a Sedan Type Passenger Car,” SAE Technical Paper 2011-01-0165 2011 10.4271/2011-01-0165
- Modlinger, F. Adams, N. “New Directions in the Optimization of the Flow around Wheels and Wheel Arches” 7 th MIRA International Conference on Vehicle Aerodynamics 22 23 October 2008 978 1 906400 05 7
- Landstrom, C. Sebben, S. Lofdahl, L. “Effects of Wheel Orientation on Predicted Flow Field and Forces When Modeling Rotating Wheels Using CFD” 8 th MIRA International Conference on Vehicle Aerodynamics 13 14 October 2010 978 1 906400 08 8
- Duncan, B. Kandasamy, S. Gau, H. Maroy, F. Belanger, A. Gruen, N. Schäufele, S. “Aerodynamic Performance Assessment of BMW Validation Models using Computational Fluid Dynamics,” SAE Technical Paper 2012-01-0297 2012 10.4271/2012-01-0297