Aeroacoustic power generated by multiple compact axisymmetric cavities : effect of hydrodynamic interference on the sound production

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    22 Citaties (Scopus)

    Uittreksel

    Aeroacoustic sound generation due to self-sustained oscillations by a series of compact axisymmetric cavities exposed to a grazing flow is studied both experimentally and numerically. The driving feedback is produced by the velocity fluctuations resulting from a coupling of vortex sheddings at the upstream cavity edges with acoustic standing waves in the coaxial pipe. When the cavities are separated sufficiently from each other, the whistling behavior of the complete system can be determined from the individual contribution of each cavity. When the cavities are placed close to each other there is a strong hydrodynamic interference between the cavities which affects both the peak amplitude attained during whistling and the corresponding Strouhal number. This hydrodynamic interference is captured successfully by the proposed numerical method. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718726]
    TaalEngels
    Artikelnummer067101
    Pagina's067101-1/18
    Aantal pagina's18
    TijdschriftPhysics of Fluids
    Volume24
    Nummer van het tijdschrift6
    DOI's
    StatusGepubliceerd - 2012

    Vingerafdruk

    aeroacoustics
    hydrodynamics
    interference
    cavities
    acoustics
    grazing flow
    Strouhal number
    vortex shedding
    standing waves
    upstream
    oscillations

    Citeer dit

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    title = "Aeroacoustic power generated by multiple compact axisymmetric cavities : effect of hydrodynamic interference on the sound production",
    abstract = "Aeroacoustic sound generation due to self-sustained oscillations by a series of compact axisymmetric cavities exposed to a grazing flow is studied both experimentally and numerically. The driving feedback is produced by the velocity fluctuations resulting from a coupling of vortex sheddings at the upstream cavity edges with acoustic standing waves in the coaxial pipe. When the cavities are separated sufficiently from each other, the whistling behavior of the complete system can be determined from the individual contribution of each cavity. When the cavities are placed close to each other there is a strong hydrodynamic interference between the cavities which affects both the peak amplitude attained during whistling and the corresponding Strouhal number. This hydrodynamic interference is captured successfully by the proposed numerical method. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718726]",
    author = "G. Nakiboglu and A. Hirschberg",
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    Aeroacoustic power generated by multiple compact axisymmetric cavities : effect of hydrodynamic interference on the sound production. / Nakiboglu, G.; Hirschberg, A.

    In: Physics of Fluids, Vol. 24, Nr. 6, 067101, 2012, blz. 067101-1/18.

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

    TY - JOUR

    T1 - Aeroacoustic power generated by multiple compact axisymmetric cavities : effect of hydrodynamic interference on the sound production

    AU - Nakiboglu,G.

    AU - Hirschberg,A.

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    N2 - Aeroacoustic sound generation due to self-sustained oscillations by a series of compact axisymmetric cavities exposed to a grazing flow is studied both experimentally and numerically. The driving feedback is produced by the velocity fluctuations resulting from a coupling of vortex sheddings at the upstream cavity edges with acoustic standing waves in the coaxial pipe. When the cavities are separated sufficiently from each other, the whistling behavior of the complete system can be determined from the individual contribution of each cavity. When the cavities are placed close to each other there is a strong hydrodynamic interference between the cavities which affects both the peak amplitude attained during whistling and the corresponding Strouhal number. This hydrodynamic interference is captured successfully by the proposed numerical method. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718726]

    AB - Aeroacoustic sound generation due to self-sustained oscillations by a series of compact axisymmetric cavities exposed to a grazing flow is studied both experimentally and numerically. The driving feedback is produced by the velocity fluctuations resulting from a coupling of vortex sheddings at the upstream cavity edges with acoustic standing waves in the coaxial pipe. When the cavities are separated sufficiently from each other, the whistling behavior of the complete system can be determined from the individual contribution of each cavity. When the cavities are placed close to each other there is a strong hydrodynamic interference between the cavities which affects both the peak amplitude attained during whistling and the corresponding Strouhal number. This hydrodynamic interference is captured successfully by the proposed numerical method. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718726]

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