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Aeroacoustics of an Automotive A-Pillar Raingutter: A Numerical Study with the Ffowcs-Williams Hawkings Method
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 16, 2005 by SAE International in United States
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A numerical simulation of the flow structure around an idealized automotive A-pillar rain-gutter and the sound radiated from it is reported. The idealized rain-gutter is an infinitesimally thin backward facing elbow mounted on a flat plate. It is kept in a virtual wind-tunnel with rectangular cross-section. The transient flow structure around the rain-gutter is described and time-averaged pressure distribution along the base plate is provided. Time-varying static pressure was recorded on every grid point on the base-plate as well as the rain-gutter surfaces and used to calculate sound pressure signal at a microphone held above the rain-gutter using the Ffowcs-Williams-Hawkings (FWH) integral method was used for calculating sound propagation. Both the transient flow simulation as well as the FWH sound calculation were performed using the commercial CFD code FLUENT6.1.22. LES (Large Eddy Simulation) with the Smagorinsky-Lilly sub-grid scale model was employed in the transient flow simulation. Results are compared with experimental data available in literature.
CitationSovani, S. and Chen, K., "Aeroacoustics of an Automotive A-Pillar Raingutter: A Numerical Study with the Ffowcs-Williams Hawkings Method," SAE Technical Paper 2005-01-2492, 2005, https://doi.org/10.4271/2005-01-2492.
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