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Spectral Properties of Wall-Pressure Fluctuations and Their Estimation from Computational Fluid Dynamics

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Flinovia - Flow Induced Noise and Vibration Issues and Aspects

Abstract

The various methods to obtain 1-point and 2-point statistical properties of wall-pressure fluctuations from CFD are described and discussed. If only averaged flow quantities are available through Reynolds Averaged Navier Stokes computations, empirical models or sophisticated statistical modeling have to be used to estimate wall-pressure spectra and spatial correlations. While very useful at design stage, their applicability to complex flows or geometries seems quite limited. Considering the rapid growth of computational power, it seems clear that the main pathway for the near future is to rely on time-dependent flow simulations, typically Large Eddy Simulations, and to estimate the pressure statistics through a posteriori signal processing. It seems also possible, at the moment only for relatively high Mach number flows, to estimate not only the hydrodynamic part but also the tiny acoustic contribution. Examples of computations of this acoustic contribution to wall-pressure are given together with related experiments.

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Acknowledgments

The authors have benefited from fruitful discussions with and inputs by Christophe Bailly, Xavier Gloerfelt and Gilles Robert. This work was performed within the framework of the Labex CeLyA of Université de Lyon, operated by the French National Research Agency (ANR-10-LABX-0060/ANR-11-IDEX-0007). Financial support of Marion Berton by DCNS Research is also acknowledged.

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Authors and Affiliations

  1. Laboratoire de Mécanique des Fluides et d’Acoustique, UMR CNRS 5509, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134, Ecully Cedex, France

    Daniel Juvé, Marion Berton & Edouard Salze

Authors
  1. Daniel Juvé
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  2. Marion Berton
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  3. Edouard Salze
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Correspondence to Daniel Juvé .

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Editors and Affiliations

  1. INSEAN - Marine Technology Research Institute, National Research Council of Italy, Rome, Italy

    Elena Ciappi

  2. Department of Industrial Engineering Aerospace Unit, Univ degli Studi di Napoli "Federico II", Napoli, Italy

    Sergio De Rosa

  3. Department of Industrial Engineering Aerospace Unit, Università di Napoli "Federico II", Napoli, Italy

    Francesco Franco

  4. Laboratoire Vibrations Acoustique Mechanical Engineering Department, Nat Inst of Applied Sciences of Lyon, Villeurbanne cedex, France

    Jean-Louis Guyader

  5. Penn State Ctr for Acoustics and Vibr, The Pennsylvania State University, State College, Pennsylvania, USA

    Stephen A. Hambric

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Juvé, D., Berton, M., Salze, E. (2015). Spectral Properties of Wall-Pressure Fluctuations and Their Estimation from Computational Fluid Dynamics. In: Ciappi, E., De Rosa, S., Franco, F., Guyader, JL., Hambric, S. (eds) Flinovia - Flow Induced Noise and Vibration Issues and Aspects. Springer, Cham. https://doi.org/10.1007/978-3-319-09713-8_2

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  • DOI: https://doi.org/10.1007/978-3-319-09713-8_2

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-09712-1

  • Online ISBN: 978-3-319-09713-8

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