Investigations of Cavity Noise Generation on a Cylinder

  • Tim Homeyer
  • Gerd Gülker
  • Christopher Haut
  • Nils Kirrkamm
  • Volker Mellert
  • Manfred Schultz-von Glahn
  • Joachim Peinke
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

Cavity noise generation is of particular interest for e.g. the aeronautical and automotive industry where a lot of different shaped cavities occur on curved surfaces. In this work the flow over a small rectangular cavity (L/D ≈ 1) on a cylinder at velocity ramps up to 45 m/s was investigated in an acoustic wind tunnel. Acoustical and PIV measurements indicate a sudden transition of the circulating flow to a turbulent boundary layer at the typical Reynolds number leading to cavity noise. The onset of the acoustic radiation is contemporaneous with this transition and shows a strong hysteresis. Pressure measurements directly on the cylinder surface reveal a hydrodynamics and acoustics coupling point in front of the cavity.

Keywords

Wind Speed Particle Image Velocimetry Turbulent Boundary Layer Sound Pressure Level Sound Generation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Cattafesta, L., Williams, D., Rowley, C., Alvid, F.: Review of active control of flow-induced cavity resonance. AIAA 2003-3567 (2003)Google Scholar
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    Colonius, T.: An Overview of Simulation, Modeling, and Active Control of Flow/Acoustic Resonance in Open Cavities. AIAA 2001-0076 (2001)Google Scholar
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    Added in proof: New measurements revealed Kelvin-Helmholtz instabilities as the source for the observed frequencies. Details will be published in another paper soonGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Tim Homeyer
    • 1
  • Gerd Gülker
    • 1
  • Christopher Haut
    • 2
  • Nils Kirrkamm
    • 1
  • Volker Mellert
    • 3
  • Manfred Schultz-von Glahn
    • 4
  • Joachim Peinke
    • 1
  1. 1.ForWind - Institute of PhysicsUniversity of OldenburgOldenburgGermany
  2. 2.Acoustics, Institute of PhysicsUniversity of OldenburgOldenburgGermany
  3. 3.Acoustics Group, Institute of PhysicsUniversity of OldenburgOldenburgGermany
  4. 4.ITAP - Institut für Technische und Angewandte Physik GmbHOldenburgGermany

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