3D CFD modelling of air pumping noise from road cavities with constant volume
CONTE ; KLEIN
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
CONTE ; KLEIN
Résumé / Abstract
In the aim of reducing noise emissions, it is important to better understand and model tyre rolling noise which is the main source of traffic noise at medium and high speed. Air pumping is a major source of tyre/road contact noise. This noise source is still not well understood and includes several mechanisms. In this context, a modelling approach using computational fluid dynamics (CFD) is presented. The approach consists of highlighting some mechanisms of air pumping occurring in the cavities at the contact area without any volume variation. The dynamic deformation of the rubber is not considered. The goal is to model some phenomena such as air compression and air drainage by considering air flow in the contact zone. A 3D CFD model of air compression and release phenomena caused by the rolling of a smooth tyre over road cavities is implemented. The model is applied to academic configurations such as a cylindrical cavity and an open transversal groove. The noise reduction due to the ventilation of the contact zone by a longitudinal groove is also investigated. This work shows the relevance of modelling air flow to study air pumping, and gives further insights into this phenomenon.
