In this work, a kinematic wave-packet model is used to predict installed-jet noise. Large-eddy simulation results of freejets, for Mach numbers 0.4 and 0.9, are used to obtain parameters of wave packets representing large-scale turbulent structures, which were used to provide a model source for the Lighthill analogy used to predict far-field noise spectra. The source amplitude in the model is calibrated using noise measurements for a freejet, and such a wave-packet source is used to predict noise of the same jet in an installed configuration using a tailored Green’s function. Results from the prediction model are compared to installed-jet experimental data for four different observer positions and a large range of frequencies. Overall, the model predicts both directivities and amplitudes similar to the experimental data, with a hump in the generated noise for lower Strouhal numbers and a clear peak near a Strouhal number of 0.2. This low-order model is fast and flexible, and it is expected to be helpful in preliminary aircraft design.


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    Titel :

    Prediction of Installed Jet Noise from Wave-Packet Models Tuned with Freejet Data



    Erschienen in:

    AIAA Journal ; 61 , 4 ; 1749-1758


    Erscheinungsdatum :

    01.04.2023




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    A Correlation of Freejet Data

    RICHARD T. DRIFTMYER | AIAA | 1972


    On freejet terminal shocks

    DRIFTMYER, R. T. | AIAA | 1970



    Nonequilibrium Alignment in a Freejet

    Shizgal, Bernie D. / Weaver, David P. | AIAA | 1994


    Measurements in freejet mixing/combustion flows

    Cohen, L. S. / Guile, R. N. | NTRS | 1970