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.


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    Title :

    Aeroacoustics of an Automotive A-Pillar Raingutter: A Numerical Study with the Ffowcs-Williams Hawkings Method


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 Noise and Vibration Conference and Exhibition ; 2005



    Publication date :

    2005-05-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Aeroacoustics of an Automotive A-Pillar Raingutter: A Numerical Study with the Ffowcs-Williams Hawkings Method

    Sovani, S. D. / Chen, K-H. / Society of Automotive Engineers | British Library Conference Proceedings | 2005


    A Ffowcs Williams - Hawkings Solver for Lattice-Boltzmann Based Computational Aeroacoustics

    Brès, Guillaume / Pérot, Franck / Freed, David | AIAA | 2010