A detailed computational aeroacoustic analysis of a high-lift flowfield is performed. Time-accurate Reynolds averaged Navier-Stokes computations simulate the free shear layer that originates from the slat cusp. Both unforced and forced cases are studied. Preliminary results show that the shear layer is a good amplifier of disturbances in the low- to midfrequency range. The Ffowcs Williams and Hawkings equation is solved to determine the acoustic field using the unsteady flow data from the Reynolds averaged Navier-Stokes calculations. The noise radiated from the excited shear layer has a spectral shape qualitatively similar to that obtained from measurements in a corresponding experimental study of the high-lift system.


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    Title :

    Time-accurate simulations and acoustic analysis of slat free shear layer


    Additional title:

    Numerische Simulation der zeitlichen Entwicklung und der Schallemission der freien Scherströmung an einem Vorflügel


    Contributors:

    Published in:

    AIAA Journal ; 40 , 7 ; 1284-1291


    Publication date :

    2002


    Size :

    8 Seiten, 15 Bilder, 1 Tabelle, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Time-accurate simulations and acoustic analysis of slat free-shear layer

    Khorrami, Mehdi / Singer, Bart / Berkman, Mert | AIAA | 2001


    Time-Accurate Simulations and Acoustic Analysis of Slat Free Shear Layer

    Mehdi R. Khorrami / Bart A. Singer / Mert E. Berkman | AIAA | 2002



    Time-Accurate Simulations and Acoustic Analysis of Slat Free-Shear-Layer: Part II

    Khorrami, Mehdi / Singer, Bart / Lockard, David | AIAA | 2002