The objective of this numerical study is to develop algorithms to model significant flow mechanisms observed in an acoustically excited jet. The shear layer is represented by its nonlinear endproduct, a series of regularly shed, discrete, axisymmetric vortices. We examine the case for which shear-layer and jet instabilities are strongly coupled. Feedback from the end of the potential cone is represented as an abrupt decrease of circulation of each vortex. Two models are discussed: one does not consider jet-pipe wall boundary conditions; the other does so using dipole rings. Results are presented for a range of parameters and indicate that the observed characteristics of the jet can be successfully predicted for use in subsequent noise calculations. (Krautzig)


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    Title :

    Discrete vortex modelling of an axisymmetric jet flowfield


    Additional title:

    Diskrete Wirbelmodellierung eines rotationssymmetrischen Duesenstromfeldes


    Contributors:

    Published in:

    Publication date :

    1980


    Size :

    10 Seiten, 11 Bilder, 2 Tabellen, 16 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Discrete vortex modeling of an axisymmetric jet flowfield

    KITAPLIOGLU, C. / KIBENS, V. | AIAA | 1980



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