Tyre/road noise: A piston approach for CFD modeling of air volume variation in a cylindrical road cavity

This paper deals with air volume variation in a road cavity during the rolling of a slick tyre leading to air-pumping. A numerical model was developed based on Computational Fluid Dynamics (CFD), coupled with a function representing the volume variation due to the tyre tread penetration inside the c...

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Bibliographic Details
Published in:Journal of sound and vibration 2020-03, Vol.469, p.115140-140, Article 115140
Main Authors: Bassil, Marianne Bou Leba, Cesbron, Julien, Klein, Philippe
Format: Article
Language:English
Subjects:
Acoustics
Aerodynamics
Air-pumping
Computational fluid dynamics
Energy
Energy levels
Fluid dynamics
Mathematical models
Mechanics
Numerical models
Overpressure
Physics
Piston method
Pumps
Rolling speed
Tires
Trailing edges
Tyre/road contact
Tyre/road noise
Volume variation
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Summary:This paper deals with air volume variation in a road cavity during the rolling of a slick tyre leading to air-pumping. A numerical model was developed based on Computational Fluid Dynamics (CFD), coupled with a function representing the volume variation due to the tyre tread penetration inside the cavity. A simplified method based on an equivalent piston-like movement of the cavity bottom is derived from a tyre/road contact model and validated by comparison with a membrane approach. This method was used to conduct a parametric study to assess the influence of volume variation and rolling speed on dynamic air pressures and associated signal energy levels. It was found that the overpressure reached during the contact increases with the volume variation of the cavity and with the rolling speed. The pressure signal energy level emitted at the leading edge increases with the velocity but is negligibly influenced by the volume variation. However, the signal energy level at the trailing edge increases with the volume variation without being influenced by the rolling speed. Furthermore, the speed exponent linking the signal energy level with rolling speed was found to be less than 4 at the leading and trailing edges which is consistent with previous work.
ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2019.115140