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Turbulent source coherence and Helmholtz number as aerodynamic noise parameters

  • IV. Noise
  • Conference paper
  • First Online:
Structure and Mechanisms of Turbulence II

Part of the book series: Lecture Notes in Physics ((LNP,volume 76))

Abstract

A coherent structures model of the noise generated by turbulence is discussed as opposed to the conventional eddy model. When assuming a direct coupling of turbulent and acoustic modes certain quasi-deterministic wave interference mechanisms occur which were ignored by many of the existing aeroacoustic theories, The introduction of an additional scaling parameter, which appears as the product of Strouhal number and Mach number, is essential when spectral scaling laws for aerodynamic noise are to be derived empirically.

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References

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Author information

Authors and Affiliations

  1. DFVLR - Institut fuer Turbulenzforschung, Berlin

    H. V. Fuchs

  2. Hermann - Föttinger - Institut fuer Thermo- und Fluiddynamik, Technische Universität, Berlin

    R. R. Armstrong

Authors
  1. H. V. Fuchs
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  2. R. R. Armstrong
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Editor information

H. Fiedler

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© 1978 Springer Verlag

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Fuchs, H.V., Armstrong, R.R. (1978). Turbulent source coherence and Helmholtz number as aerodynamic noise parameters. In: Fiedler, H. (eds) Structure and Mechanisms of Turbulence II. Lecture Notes in Physics, vol 76. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0012622

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  • DOI: https://doi.org/10.1007/BFb0012622

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-08767-0

  • Online ISBN: 978-3-540-35830-5

  • eBook Packages: Springer Book Archive

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