Avoiding narrowband components in the acoustic spectrum is one of the most critical objectives in the automotive aeroacoustic optimization process. The underlying physical mechanisms are not completely understood. In a preceding numerical and experimental investigation, we performed large eddy simulations of an early-development stage realistic side-view mirror, where tonal noise was captured and the principle mechanisms were identified. In this contribution, we present simulations on a simplified two-dimensional geometry that is based on these findings. It is shown that the basic flow topology relevant for tonal noise generation on the original side-view mirror as well as the tonal noise source is reproduced in the 2D case. Furthermore, we present comparisons with measurements and the necessity and influence of a splitter plate downstream of the 2D body to avoid large scale vortex shedding. The present results are the basis for ongoing, detailed numerical analyses of the fundamental source mechanism.


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    Title :

    Aeroacoustic Tonal Noise Generation Analysis on a Simplified Side-View Mirror Using a High Order Discontinuous Galerkin Spectral Element Method


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    9th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference ; 2016



    Publication date :

    2016-06-15




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English