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Experimental determination of the speed of sound in cavitating flows

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Abstract

This paper presents measurements of the speed of sound in two-phase flows characterized by high void fraction. The main objective of the work is the characterization of wave propagation in cavitating flows. The experimental determination of the speed of sound is derived from measurements performed with three pressure transducers, while the void fraction is obtained from analysis of a signal obtained with an optical probe. Experiments are first conducted in air/water mixtures, for a void fraction varying in the range 0–11%, in order to discuss and validate the methods of measurement and analysis. These results are compared to existing theoretical models, and a nice agreement is obtained. Then, the methods are applied to various cavitating flows. The evolution of the speed of sound according to the void fraction α is determined for α varying in the range 0–55%. In this second configuration, the effect of the Mach number is included in the spectral analysis of the pressure transducers’ signals, in order to take into account the possible high flow compressibility. The experimental data are compared to existing theoretical models, and the results are then discussed.

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Acknowledgments

The authors are very grateful to EDF and CETIM for their financial support of the present work, in the frame of French Industry Research Consortium for Turbomachinery (CIRT). They also express their gratitude to the technical staff of Arts et Metiers ParisTech, especially J. Choquet and P. Olivier, for their assistance.

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Authors and Affiliations

  1. Arts et Metiers ParisTech/Laboratoire de Mécanique de Lille (UMR 8107), 8 boulevard Louis XIV, 59046, Lille Cedex, France

    Hiva Shamsborhan, Olivier Coutier-Delgosha, Guy Caignaert & Fadi Abdel Nour

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  1. Hiva Shamsborhan
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  2. Olivier Coutier-Delgosha
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  3. Guy Caignaert
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  4. Fadi Abdel Nour
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Correspondence to Hiva Shamsborhan.

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Shamsborhan, H., Coutier-Delgosha, O., Caignaert, G. et al. Experimental determination of the speed of sound in cavitating flows. Exp Fluids 49, 1359–1373 (2010). https://doi.org/10.1007/s00348-010-0880-6

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  • DOI: https://doi.org/10.1007/s00348-010-0880-6

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