This paper deals with the acoustic velocity field simulation generated by interaction of flow with moving bodies. Starting from the Ffowcs Williams and Hawkings equation, an analytical formulation of the acoustic velocity is derived for sources in arbitrary motion. This makes the imposition of the boundary condition on a (rigid) scattering surface much more straightforward, as, if the traditional pressure formulation is used, then the pressure gradient must be calculated. Computational results for a pulsating sphere, dipole source, and a propeller case with subsonic tips verify this formulation.


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    Title :

    Acoustic Velocity Formulation for Sources in Arbitrary Motion


    Contributors:
    Ghorbaniasl, G. (author) / Carley, M. (author) / Lacor, C. (author)

    Published in:

    AIAA Journal ; 51 , 3 ; 632-642


    Publication date :

    2012-11-27


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English