A Computational Study of the Flow Around an Isolated Non-Pneumatic Tire 2014-01-9123
An understanding of the flow around a tire in contact with the ground is important when designing fuel-efficient tires as the aerodynamic drag accounts for about one third of an entire vehicle's rolling loss. Recently, non-pneumatic tires (NPTs) have drawn attention mainly due to their low rolling resistance associated with the use of low viscoelastic materials in their construction. However, an NPT's fuel efficiency should be re-evaluated in terms of aerodynamic drag: discrete flexible spokes in an NPT may cause more aerodynamic drag, resulting in greater rolling resistance. In this study, the aerodynamic flow around a non-pneumatic tire in contact with the ground is investigated for i) stationary and ii) rotating cases using the steady state Reynolds-Averaged Navier-Stokes (RANS) method. A sensitivity analysis was carried out with a varying mesh density. The flow into cavity by the discrete spoke geometry of the NPT does not significantly affect the overall aerodynamic drag.
Citation: Heo, H., Ju, J., Kim, D., and Kim, H., "A Computational Study of the Flow Around an Isolated Non-Pneumatic Tire," SAE Int. J. Passeng. Cars - Mech. Syst. 7(1):405-412, 2014, https://doi.org/10.4271/2014-01-9123. Download Citation
Author(s):
Hyeonu Heo, Jaehyung Ju, Doo Man Kim, Harkbong Kim
Affiliated:
Korea Aerospace University, University of North Texas
Pages: 8
ISSN:
1946-3995
e-ISSN:
1946-4002
Also in:
SAE International Journal of Passenger Cars - Mechanical Systems-V123-6EJ, SAE International Journal of Passenger Cars - Mechanical Systems-V123-6
Related Topics:
Drag
Fuel economy
Energy conservation
Aerodynamics
Tires
Roll
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »