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Cavitating Orifice: Flow Regime Transitions and Low Frequency Sound Production

[+] Author Affiliations
Philippe Testud

LaMSID UMR CNRS-EDF, Clamart, France

Avraham Hirschberg

Technische Universiteit Eindhoven, Eindhoven, The Netherlands

Pierre Moussou

LaMSID UMR CNRS EDF, Clamart, France

Yves Aurégan

Université du Maine, Le Mans, France

Paper No. PVP2005-71232, pp. 437-445; 9 pages
doi:10.1115/PVP2005-71232
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 4: Fluid Structure Interaction
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4189-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

Detailed data are provided for the broadband noise in a cavitating pipe flow through a circular orifice in water. Experiments are performed under industrial conditions, i.e., with a pressure drop varying from 3 to 30 bars and a cavitation number in the range 0.10 ≤ σ ≤ 0.77. The speed of sound downstream of the orifice happens to vary spontaneously for a given set of hydraulic conditions. In the intermediate ‘developed cavitation’ regime, whistling associated with periodic vortex shedding is observed. In the ‘super cavitation’ regime, a vapor cloud develops itself and the whistling disappears. The broadband noise in each regime is presented and its dimensionless representation is discussed.

Copyright © 2005 by ASME

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