Prediction of Interior Noise in a Sedan Due to Exterior Flow

Paper #:
  • 2015-01-2331

Published:
  • 2015-06-15
Citation:
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, https://doi.org/10.4271/2015-01-2331.
Pages:
7
Abstract:
Aero-vibro-acoustic prediction of interior noise associated with exterior flow requires accurate predictions of both fluctuating surface pressures across the exterior of a vehicle and efficient models of the vibro-acoustic transmission of these surface pressures to the interior of a vehicle. The simulation strategy used in this paper combines both CFD and vibro-acoustic methods. An accurate excitation field (which accounts for both hydrodynamic and acoustic pressure fluctuations) is calculated with a hybrid CAA approach based on an incompressible unsteady flow field with an additional acoustic wave equation. To obtain the interior noise level at the driver's ears a vibro-acoustic model is used to calculate the response of the structure and interior cavities. The aero-vibro-acoustic simulation strategy is demonstrated for a Mercedes-Benz S-class and the predictions are compared to experimental wind tunnel measurements.
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