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Investigation of Two Mechanisms Governing Cloud Cavitation Shedding: Experimental Study and Numerical Highlight

[+] Author Affiliations
Kilian Croci, Petar Tomov, Florent Ravelet, Amélie Danlos, Sofiane Khelladi, Jean-Christophe Robinet

Arts et Métiers ParisTech, Paris, France

Paper No. IMECE2016-65420, pp. V007T09A001; 11 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5061-9
  • Copyright © 2016 by ASME


Cavitation is a phenomenon of classical interest which can be observed in various applications. It consists in a transition of phase due to a pressure drop under the saturation pressure of a liquid. The unsteady behavior of this phenomenon leads to generate some issues such as erosion, noise or vibrations: as a result the comprehension of the cavity dynamics remains of crucial importance. Unsteady cavitation has been investigated in numerous studies and a mechanism of re-entrant jet has been firstly identified as responsible of the cavity shedding process. Recently, a second shedding mechanism, induced by a shock wave propagation due to the condensation of vapor structures, has been experimentally highlighted with X-ray measurements [1]. The present paper focuses on the experimental detection, with a wavelet method, of these two shedding features on 2D image sequences recorded with a high-speed camera about a double transparent horizontal Venturi nozzle with 18°/8° convergent/divergent angles respectively. A compressible two-phase flow numerical 3D model is performed in complement in order to illustrate some phenomena hardly perceptible experimentally.

Copyright © 2016 by ASME
Topics: Cavitation



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