This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Computational Prediction of Vehicle Aerodynamic Noise by Integration of a CFD Technique with Lighthill's Acoustic Analogy
Annotation ability available
Sector:
Language:
English
Abstract
Objective of the present work is the development and validation of a computational methodology for the prediction of flow-induced noise around a vehicle. The technique employed makes use of the Lighthill's acoustic analogy revised for low Mach number flows and consists of two steps: prediction of noise sources over the body surface by means of a suitable Computational Fluid Dynamics (CFD) technique and subsequent prediction of the radiated noise by solving the Ffowks-Williams Hawkings equation. For testing the methodology flows around a cylinder and a test shape, generating the type of flows occuring around the A-pillar of a car, have been employed. Results are compared with experimental data. The paper demonstrates the feasibility of computational prediction of aerodynamic noise even for turbulent high Reynolds number flows.
Authors
Citation
Bergamini, P., Casella, M., and Vitali, D., "Computational Prediction of Vehicle Aerodynamic Noise by Integration of a CFD Technique with Lighthill's Acoustic Analogy," SAE Technical Paper 970401, 1997, https://doi.org/10.4271/970401.Also In
References
- George R. “Automobile Aerodynamic Noise” SAE paper 900315 1990
- Hardin J. C. “Computational Approaches to Computational Aero-Acoustics” Applied Aero-Acoustics: Prediction Methods 1996
- Tam K. W. “Numerical Methods in Computational Aeroacoustics” Applied Aero-Acoustics: Prediction Methods 1996
- Baysal O. Yen G.W. Fouladi K. “Navier-Stokes Computations of Cavity Aeroacoustics with Suppression Devices” J. of Vibration and Acoustics 116 105 112 1994
- Kumarasamy S. Barlow J. “Computation of the Noise due to the Flow over a Half Cylinder in Ground Effect” AIAA paper 961733 1996
- Hardin J. C. Pope D. S. “An Acoustic/Viscous splitting Technique for Computational Aeroacoustics” J. Theory and Comp. Fluid Dynamics 6 1994
- Hardin J. C. Pope D. S. “Sound Generation by Flow over a Two-Dimensional Cavity” AIAA J. 33 3 1995
- Lighthill M. J. “On sound generated aerodinamically: I. General Theory” Proc. Royal Society 211 1952
- Goldstein M. E. Aeroacostics McGraw-Hill 1976
- Ffowcs-Williams J.E. Hawkings D.L. “Sound Generation by Turbulence and Surfaces in Arbitrary Motion” Phil. Trans. Royal Society 264 1151 1969
- Roger M. “Noise from Moving Surfaces” Applied Aero-Acoustics: Prediction Methods 1996
- Roger M. “On the Noise from Open Rotors” Applied Aero-Acoustics: Prediction Methods 1996
- Lyrintzis A.S. “Review: The Use of Kirchhoff's Method in Computational Aeroacoustics” J. of Fluids Engineering 116 665 676 1994
- Ota D.K. Ramakrishnan S.V. Szema K.Y. Chakravarthy S.R. Vitali D.F. “Computation of External Automobile Body shapes” SAE paper 932887 1993
- Goldberg U.C. “A pointwise One-Equation Turbulence Model for Wall-Bounded and Free Shear Flows” Turbulence, Heat and Mass Transfer Begell House inc. 1996
- Chen C.L. Chakravarthy S.R. Bihari B.L. “Numerical Solution of Acoustic Equation on Unstructured Grids Using a CFD-Based Approach” AIAA Paper 922698 1992
- Vigè D. “Modelli Predittivi di Campi Aeroacustici per Applicazioni Automobilistiche” Chiocchia G. Marsilio R. Politecnico di Torino 1996
- Roger M.