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Excitation of Instability Waves

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Book cover Aero- and Hydro-Acoustics

Part of the book series: IUTAM Symposia ((IUTAM))

Summary

A brief survey is given on artificial excitation of instability waves in parallel flows. There are basically two categories of unstable flows:

  1. (i)

    convectively unstable and

  2. (ii)

    absolutely unstable flows.

The perturbation level in convectively unstable flows, e.g., boundary layers and most free shear flows, depends on the excitation only. On the other hand, absolutely unstable flows, e.g., wake flows and hot jets, do maintain fluctuations independent of any exterior excitation. Finally, effects of non-parallel mean flow and of varying boundary conditions on instability wave excitation are discussed.

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Author information

Authors and Affiliations

  1. Abteilung Turbulenzforschung, Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., Müller-Breslau-Str. 8, 1000, Berlin 12, Germany

    D. W. Bechert

Authors
  1. D. W. Bechert
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Editor information

Editors and Affiliations

  1. Département Acoustique, Ecole Centrale de Lyon, 36, av. Guy de Collongue, BP 163, 69131, Ecully Cedex, France

    Geneviève Comte-Bellot

  2. Dept. of Engineering, University of Cambridge, Trumpington Street, CB2-1PZ, GB Cambridge, England

    John E. Ffowcs Williams

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© 1986 Springer, Berlin Heidelberg

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Bechert, D.W. (1986). Excitation of Instability Waves. In: Comte-Bellot, G., Williams, J.E.F. (eds) Aero- and Hydro-Acoustics. IUTAM Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82758-7_34

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  • DOI: https://doi.org/10.1007/978-3-642-82758-7_34

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-82760-0

  • Online ISBN: 978-3-642-82758-7

  • eBook Packages: Springer Book Archive

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