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Acoustics of Travelling Bubble Cavitation

  • J. Buist
Conference paper
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Summary

Experiments on cavitation prove that the noise level is highly dependent on the type of cavitation. Usually it is expected that bubble cavitation is much less severe than cloud cavitation. To verify this expectation, noise measurements on a bubble stream over a hydrofoil were done at Marin (Wageningen ,The Netherlands). These experiments show that there is not much difference irrespective of the fact whether the bubbly flow is clustering or not.

In this paper the noise level produced by a macroscopically steady bubbly layer on a hydrofoil is predicted analytically, based on the stochastic properties of the fluctuating quantities in the layer. This analysis uses the technique of Fourier-Stieltjes transformation as used by O.M. Phillips. In this way, the sound spectrum outside the bubble layer can be correlated to the covariance of the fluctuating quantities, as gasfraction, velocity etc.,assuming for instance that the bubble layer is stochastically stationairy and almost homogeneous.

Based on this theory an estimate can be made of the relative importance of cluster formation, in dealing with the sound production of bubble layers.

Keywords

Bubble Cavitation Bubbly Flow Sound Production Sound Radiation Outer Flow 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • J. Buist
    • 1
  1. 1.Department of Mechanical EngineeringUniversity TwenteThe Netherlands

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