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Leveraging Flow-Induced Vibration for Manipulation of Airfoil Tonal Noise

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Flinovia—Flow Induced Noise and Vibration Issues and Aspects-III (FLINOVIA 2019)

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Abstract

A novel method for reduction in the airfoil tonal noise using flow-induced vibrations is explored by using a flush-mounted elastic panel over the suction surface of a NACA 0012 airfoil at low Reynolds number of \(5\times 10^4\). The fundamental aim of this approach is to reduce the airfoil tonal noise while maintaining laminar boundary layer over the airfoil with minimum or no penalty on the aerodynamic performance of the airfoil. Direct aeroacoustics simulation using conservation element and solution element method along with linear stability analysis is employed to study the aeroacoustic structural interaction between the flow field and elastic panel. Panel parameters are carefully selected to ensure that the natural frequency of panel in the presence of flow field coincides with the first dominant frequency of naturally evolving boundary layer disturbance on the airfoil suction surface. To gain further insight on the sensitivity of panel parameters on its vibration behavior and magnitude of reduction in tonal noise, a parametric study is also carried out. Contributions of panel density and thickness are found to be dominant in noise reduction. A maximum sound pressure level reduction of 2.74 dB is achieved for the current flow conditions through the proposed strategy.

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Acknowledgements

The authors gratefully acknowledge the support given by the Central Research Grant of the Hong Kong Polytechnic University (PolyU) under grant no. G-YBGF. The third author acknowledges the support from a research donation from the Philip K. H. Wong Foundation under grant no. 5-ZH1X. The first and fourth authors gratefully acknowledge the support with research studentship tenable at Department of Mechanical Engineering, PolyU.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

    Irsalan Arif, Garret C. Y. Lam, Randolph C. K. Leung & Di Wu

Authors
  1. Irsalan Arif
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  2. Garret C. Y. Lam
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  3. Randolph C. K. Leung
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  4. Di Wu
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Corresponding author

Correspondence to Irsalan Arif .

Editor information

Editors and Affiliations

  1. CNR-INSEAN, Rome, Italy

    Elena Ciappi

  2. DII, University of Naples Federico II, Napoli, Italy

    Sergio De Rosa

  3. DII, University of Naples Federico II, Napoli, Italy

    Francesco Franco

  4. ARL, Pennsylvania State University, State College, PA, USA

    Stephen A. Hambric

  5. Dept of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

    Randolph C. K. Leung

  6. École Centrale de Lyon, Écully, France

    Vincent Clair

  7. Laboratoire Vibrations Acoustique, University of Lyon, INSA-Lyon, Villeurbanne, France

    Laurent Maxit

  8. Laboratoire Vibrations Acoustique, University of Lyon, INSA-Lyon, Villeurbanne, France

    Nicolas Totaro

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Arif, I., Lam, G.C.Y., Leung, R.C.K., Wu, D. (2021). Leveraging Flow-Induced Vibration for Manipulation of Airfoil Tonal Noise. In: Ciappi, E., et al. Flinovia—Flow Induced Noise and Vibration Issues and Aspects-III. FLINOVIA 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-64807-7_17

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  • DOI: https://doi.org/10.1007/978-3-030-64807-7_17

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-64806-0

  • Online ISBN: 978-3-030-64807-7

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