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Calculation Process with Lattice Boltzmann and Finite Element Methods to Choose the Best Exterior Design for Wind Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 5, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Wind noise in automobile is becoming more and more important as the customer expectations increase. On the other hand, great progress has been made on engine and road noises, especially for electric and hybrid vehicles. Thus, the wind noise is now by far the major acoustic source during road and motorway driving.
As for other noises, automobile manufacturers must be able, for a new car project, to specify, calculate and measure each step of the acoustic cascading:
- Transfers, both solid and air borne
In the case of the automotive wind noise, the excitation source is the dynamic pressure on the vehicle’s panels. This part of the cascading is the one influenced by the exterior design. Even if many others components (panels, seals, cabin trims) have a big influence, the exterior design is a major issue for the wind noise. The wind noise level in the cabin may change significantly with only a small modification of the exterior design.
This paper addresses the problem of doing the good choice of exterior design in the early phases of a new vehicle’ project, to reduce the wind noise. First, it reminds the industrial context for an automotive car manufacturer and the phenomenon existing in the coupling between a turbulent flow and a vehicle’s panel.
Then it presents a new numerical process based on the dynamic coupling of two models:
- Calculation of the flow and pressure around the vehicle with a solver based on the Lattice Boltzmann Method
- Vibration and acoustic radiated by the lateral window with a finite element model
The advantages, disadvantages and limits of the process are presented. Finally, the method is validated by comparison with wind tunnel measurements.
CitationBaudet, G., Dutrion, C., Lorenzi, R., Gendre, F. et al., "Calculation Process with Lattice Boltzmann and Finite Element Methods to Choose the Best Exterior Design for Wind Noise," SAE Technical Paper 2019-01-1471, 2019, https://doi.org/10.4271/2019-01-1471.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- “New European Vehicle Quality Survey,” http://ipsos-nevqs-qualityconnection.com/.
- Souffleries Aéroacoustiques Automobiles, Montigny-le-Bretonneux, http://www.soufflerie2a.com/.
- Illy, H. and Ricot, D. , “Etude de la structure de l'excitation aéroacoustique de vitrages automobiles,” in CFM 2009, Marseille France, 2009.
- Baudet, G. , “Wind Noise Source Identification by Inverse Method in Wind Tunnel Test,” SAE Technical Paper 2017-01-1784, 2017, doi:10.4271/2017-01-1784.
- Pezerat, C. , “Prospects for Vibroacoustic Methods in Automotive Industry,” in SIA 2010, Le Mans France, 2010.
- Hekmati, A., Ricot, D., and Druault, P. , “Vibroacoustic Behavior of a Plate Excited by Synthesized Aeroacoustic Pressure Fields,” in 16th AIAA/CEAS Aeroacoustics Conference, Stockholm, Sweden, 2010.
- Schell, A. and Cotoni, V. , “Prediction of Interior Noise in a Sedan Due to Exterior Flow,” SAE Int. J. Passeng. Cars - Mech. Syst 8(3):1090-1096, 2015, doi:10.4271/2015-01-2331.
- “ProLB - CS Communication & Systèmes,” http://www.prolb-cfd.com/.
- Aidun, C.K. and Clausen, J.R. , Annu. Rev. Fluid Mech. 42:439, 2010.
- Shan, X. and He, X. , “Discretization of the Velocity Space in the Solution of the Boltzmann Equation,” Physical Review Letters 80.1 65, 1998.
- D’Humières, D. , “Multiple-Relaxation-Time Lattice Boltzmann Models in Three Dimensions,” Philosophical Transactions of the Royal Society of London A : Mathematical, Physical and Engineering Sciences 360(1792):437-451, 2002.
- Marié, S., Ricot, D., and Sagaut, P. , “Comparison between Lattice Boltzmann Method and Navier-Stokes High Order Schemes for Computational Aeroacoustics,” Journal of Computational Physics 228 4:1056-1070, 2009.
- Tam, C.K.W. and Webb, J.C. , “Dispersion-Relation Preserving Finite Difference Schemes for Computational Acoustics,” Journal of Computational Physics 107(2):262-281, 1993.
- Bogey, C. and Bailly, C. , “A Family of Low Dissipative Explicit Schemes for Flow and Noise Computations,” Journal of Computational Physics 194:194-214, 2004.
- Gendre, F., Ricot, D., Fritz, G., Sagaut, P. et al. , “Grid Refinement for Aeroacoustics in the Lattice Boltzmann Method: A Directional Splitting Approach,” Physical Review E 96(2):023311, 2017.
- Lévêque, E. et al. , “Shear-Improved Smagorinsky Model for Large Eddy Simulation of Wall-Bounded Turbulent Flows,” Journal of Fluid Mechanics 570:491-502, 2007.
- Touil, H., Ricot, D., and Lévêque, E. , “Direct and Large-Eddy Simulation of Turbulent Flows on Composite Multi-Resolution Grids by the Lattice Boltzmann Method,” Journal of Computational Physics 256:220-233, 2014.
- Lévêque, E., Touil, H., Malik, S., Ricot, D. et al. , “Wall-Modeled Large-Eddy Simulation of the Flow Past A Rod-Airfoil Tandem by the Lattice Boltzmann Method,” International Journal of Numerical Methods for Heat & Fluid Flow, 2018.
- Sengissen, A., Giret, J.-C., Coreixas, C., and Boussuge, J.-F. , “Simulations of LAGOON Landing-Gear Noise Using Lattice Boltzmann Solver,” in 21st AIAA/CEAS Aeroacoustics Conference, AIAA AVIATION Forum, (AIAA 2015-2993).
- Adam, J.-L. and Morin, F. , “Direct Aeroacoustic Computation of Exhaust Mufflers Flow Noise,” in International Conference : Automotive NVH comfort, SIA, October 22, 23, 2014.
- Actran - MSC Software, http://www.mscsoftware.com/product/actran-acoustics.