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Boundary layer noise Part 1: generation mechanisms

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Noise Sources in Turbulent Shear Flows: Fundamentals and Applications

Part of the book series: CISM International Centre for Mechanical Sciences ((CISM,volume 545))

Abstract

Boundary layer noise concerns the generation of acoustic waves as an effect of the interaction of a fluid with a moving surface. Several issues are related to the noise generation mechanisms in such a configuration. In the present description we focalize mainly onto the case of an infinite flat plate and two main distinct situations are considered. The first one deals with the prediction of the far field noise as accomplished from the classical integral theories, and the main formulations, including Curle’s approach, are briefly reviewed. A novel approach based on the computation of the surface transpiration velocity is also presented. The second aspect concerns the interior noise problem and it is treated from the view point of the fluid dynamic effects rather than from that of the structural dynamics. Attention is focused on the statistical properties of the wall pressure fluctuations and a review of the most effective theoretical models predicting statistical quantities is given. The discussion is completed by a short review of the pressure behavior in realistic situations, including the separated boundary layers in incompressible and compressible conditions and the effect of shock waves at transonic Mach numbers.

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  1. Dipartimento di Ingegneria Meccanica e Industriale, Universitá Roma Tre, Via della Vasca Navale 79, 00146, Roma, Italy

    Roberto Camussi & Alessandro Di Marco

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  1. Roberto Camussi
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  2. Alessandro Di Marco
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  1. Università di Roma Tre, Roma, Italy

    Roberto Camussi

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Camussi, R., Di Marco, A. (2013). Boundary layer noise Part 1: generation mechanisms. In: Camussi, R. (eds) Noise Sources in Turbulent Shear Flows: Fundamentals and Applications. CISM International Centre for Mechanical Sciences, vol 545. Springer, Vienna. https://doi.org/10.1007/978-3-7091-1458-2_6

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  • DOI: https://doi.org/10.1007/978-3-7091-1458-2_6

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