Effects of Surface Curvature and Texture on Passenger Car Tire Noise Generation on Roadwheels and Roadways

2009 ◽  
pp. 250-250-21
Author(s):  
PR Donavan ◽  
LJ Oswald
Keyword(s):  
Surface Curvature ◽  
Noise Generation ◽  
Passenger Car ◽  
Tire Noise

A Computational Fluid Dynamics Model for Investigating Air-Pumping Mechanisms in Air-Borne Tire Noise

2016 ◽  
Vol 44 (3) ◽  
pp. 191-211 ◽  
Author(s):  
Prashanta Gautam ◽  
Abhilash J. Chandy
Keyword(s):  
Stokes Equations ◽  
Road Traffic ◽  
Near Field ◽  
Spectral Characteristics ◽  
Small Scale ◽  
Road Traffic Noise ◽  
Far Field ◽  
Noise Generation ◽  
Tire Noise ◽  
Noise Characteristics

ABSTRACT The reduction in power train noise over the past decade has led to an increased focus in reducing tire/road noise, largely due to the environmental concerns related to road traffic noise in industrial countries. Computational fluid dynamic (CFD) simulations conducted using ANSYS FLUENT are presented here with the objective of understanding air-pumping noise-generation mechanisms due to tire/road interaction. The CFD model employs a large eddy simulation turbulence modeling approach, in which the filtered compressible Navier-Stokes equations are solved to obtain temporally and spatially accurate near-field pressure fluctuations for a two-dimensional (2D) tire geometry with (1) one groove and (2) two grooves. In addition, the Ffowcs-Williams and Hawkings (FW-H) acoustic model is used to predict far-field acoustics. The deformation of the grooves, as the tire rotates, is represented by prescribed sidewall movements. Consequently, the solution to the numerical problem is obtained through a single process, thereby enabling the prediction of small-scale air pumping, horn effect, and far-field acoustics in a single simulation. The acoustic characteristics associated with air pumping are studied through spectral analysis tools, and comparisons show that the additional groove on the horn geometry alters the spectral characteristics of air pumping. Validation of the model is conducted through qualitative and quantitative comparisons with previous studies. These simulations are intended to provide a deeper understanding about the small-scale noise generation as well as the near-field and far-field acoustics, thereby paving the way for the automotive manufacturer to compare a variety of air-related tire noise characteristics without spending time and money for vehicle pass-by tests.

Characterization of Structure-Borne Road/Tire Noise Inside a Passenger Car Cabin Using Path Based Analysis

2013 ◽  
Author(s):  
Chatterjee Joydeep ◽  
Chetan Prakash Jain ◽  
Deepak Kumar Panda
Keyword(s):  
Passenger Car ◽  
Tire Noise

An experimental and computational investigation of air-borne noise generation mechanisms in tires

2018 ◽  
Vol 25 (3) ◽  
pp. 529-537 ◽  
Author(s):  
Prashanta Gautam ◽  
Yousof Azizi ◽  
Abhilash J. Chandy
Keyword(s):  
Spectral Characteristics ◽  
Operating Conditions ◽  
Complex Nature ◽  
Generation Process ◽  
Noise Generation ◽  
Frequency Spectra ◽  
Tire Noise ◽  
Noise Data ◽  
Generation Mechanisms ◽  
Air Pockets

The complex nature of the tire/road noise generation process makes it difficult to isolate and study each mechanism individually. This paper presents an experimental and numerical investigation of air-borne tire noise generation mechanisms for a realistic tire. Experimentally, a single slot is cut into the tire and the noise data are measured and studied. Air-borne noise is isolated by filling the slot with foam and comparing the resulting frequency spectra. Numerically, a previously developed computational fluid dynamics tire noise prediction model is employed to predict the air-borne noise for the same tire, under similar operating conditions. A direct comparison between the experimental and computational results is also presented in terms of pressure time traces and spectral characteristics. Comparisons indicate that the computational model is capable of predicting the noise generated by the air pockets in the tire. While providing a deeper understanding of the causes of air-borne noise, this paper also aims to demonstrate the use of a computational tool that can be used to obtain a reasonably accurate prediction of air-borne tire noise.

A Three-Dimensional Numerical Investigation of Air Pumping Noise Generation in Tires

2016 ◽  
Vol 138 (6) ◽  
Author(s):  
Prashanta Gautam ◽  
Abhilash J. Chandy
Keyword(s):  
Noise Reduction ◽  
Numerical Models ◽  
Fluid Dynamic ◽  
Near Field ◽  
Three Dimensional ◽  
Complex Nature ◽  
Noise Generation ◽  
Vehicle Noise ◽  
Tire Noise ◽  
Generation Mechanisms

Tire noise reduction is an important aspect of overall vehicle noise reduction. However, due to the complex nature of tire noise generation and correlation between various generation mechanisms, it is difficult to isolate, predict, and control tire noise. Air-related noise generation mechanisms in tires are tough to predict experimentally, resulting in the need for an accurate numerical model. Computational fluid dynamics (CFDs) is used here to propose a numerical tool capable of predicting air-pumping noise generation. Slot deformations are prescribed by custom functions instead of using structural solvers and the rotation of tire is represented by using mesh motion and deformation techniques. Near-field and far-field acoustic characteristics are predicted using fluid dynamic equations and acoustic models. The use of various spectral analysis tools show that the proposed model is capable of predicting the high frequency air-pumping noise while also predicting other air-related mechanisms such as pipe resonance, Helmholtz resonance, and rotational turbulence. This study is intended to provide an understanding of the various air-related noise generation mechanisms so that numerical models can be used in the future to predict tire acoustics economically and effectively.

Identification of Tire Noise Generation Mechanisms Using a Roadwheel Facility

1980 ◽  
Author(s):  
Kenneth J. Plotkin ◽  
Mark M. Montroll ◽  
William R. Fuller ◽  
Harvey J. Nozick
Keyword(s):  
Noise Generation ◽  
Tire Noise ◽  
Generation Mechanisms

Tire Noise Generation: The Roles of Tire and Road

1976 ◽  
Author(s):  
Joseph Pope ◽  
William C. Reynolds
Keyword(s):  
Noise Generation ◽  
Tire Noise
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