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    Computations of Nonlinear Propagation of Sound Emitted from High Speed Mixing Layers 
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    Computations of Nonlinear Propagation of Sound Emitted from High Speed Mixing Layers

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    Published version (2.710Mb)
    Volume
    3
    Pagination
    11 - 20 (10)
    Publisher
    Bentham Open
    Publisher URL
    http://www.bentham.org/open/toacoj/
    DOI
    10.2174/1874837601003010011
    Journal
    Open Acoustics Journal
    ISSN
    1874-8376
    Metadata
    Show full item record
    Abstract
    Non-linear sound propagation is investigated computationally by simulating compressible time-developing mixing layers using the Large Eddy Simulation (LES) approach and solving the viscous Burgers Equation. The mixing layers are of convective Mach numbers of 0.4, 0.8 and 1.2. The LES results agree qualitatively with known flow behaviour. Mach waves are observed in the near sound field of the supersonic mixing layer computed by the LES. These waves show steepening typical to non-linear propagation. Further calculations using the Burgers equation support this finding, where the initial wave slope has a role in kicking them. No visible non-linear propagation effects were found for the subsonic mixing layers. The effects of geometrical spreading and viscosity are also considered.
    Authors
    Punekar, J; Avital, EJ; Musafir, RE
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/26646
    Collections
    • School of Engineering and Materials Science [2029]
    Language
    English
    Licence information
    This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
    Copyright statements
    © Punekar et al.; Licensee Bentham Open
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