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TECHNICAL PAPERS

Influence of Roughness on the Two-Phase Flow Structure of Sheet Cavitation

[+] Author and Article Information
B. Stutz

Université de Pau et des Pays de l’Adour, Avenue de l’Université, 64000 Pau, Francee-mail: stutz@genserver.insa-lyon.fr

J. Fluids Eng 125(4), 652-659 (Aug 27, 2003) (8 pages) doi:10.1115/1.1596240 History: Received March 14, 2002; Revised March 18, 2003; Online August 27, 2003
Copyright © 2003 by ASME
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References

Laberteaux, K. R., and Ceccio, S. L., 1998, “Flow in the Closure Region of Closed Partial Attached Cavitation,” Proceedings of the Third International Symposium on Cavitation, J. M. Michel and H. Kato, eds., Grenoble, France, 1 , pp. 197–202.
Merle, L., 1994, “Etude Experimentale et modèle Physique d’un écoulement Cavitant Avec Effect Thermodynamique,” Doctoral thesis, Institut National Polytechnique de Grenoble.
Le,  Q., Franc,  J. P., and Michel,  J. M., 1993, “Partial Cavities: Global Behavior and Mean Pressure Distribution,” ASME J. Fluids Eng., 115, pp. 243–248.
Kamono, H., Kato, H., Yamaguchi, H., and Miyanaga, M., 1993, “Simulation of Cavity Flow by Ventilated Cavitation on a Foil Section,” ASME, New York, ASME-FED-153, pp. 183–189.
Ceccio,  S. L., and Brennen,  C. E., 1991, “Observations of the Dynamics and Acoustics of Travelling Bubble Cavitation,” J. Fluid Mech., 233, pp. 633–660.
Callenaere, M., 1999, “Etude des poches de Cavitation Partielle en écoulement Interne,” Doctoral thesis, Institut National Polytechnique de Grenoble.
Stutz,  B., and Reboud,  J. L., 1997, “Experiment on Unsteady Cavitation,” Exp. Fluids, 22, pp. 191–198.
Serisawa,  A., Kataoka,  I., Michivik,  M., and Park,  S. H., 1975, “Turbulence Structure of Air-Water Bubbly Flow—Measuring Techniques,” Int. J. Multiphase Flow, 2, pp. 221–233.
Galaup, J. P., 1975, “Contribution à l’Etude des Méthodes de Mesure des Ecoulements Diphasiques,” Doctoral thesis, Institut National Polytechnique de Grenoble.
Stutz,  B., and Reboud,  J. L., 1997, “Two Phase Flow Structure of Sheet Cavitation,” Phys. Fluids, 9, pp. 3678–3686.
Stutz,  B., and Reboud,  J. L., 2000, “Measurements Within Unsteady Cavitation,” Exp. Fluids, 29, pp. 545–552.
Lush,  P. A., and Skipp,  S. R., 1986, “High Speed Cine Observations of Cavitating Flow in a Duct,” Int. J. Heat Fluid Flow, 7, pp. 283–290.
de Lange, D. F., de Bruin, G. J., and van Wijngaarden L., 1994, “On the Mechanism of Cloud Cavitation—Experiment and Modelling,” Proceedings of the Second International Symposium on Cavitation, H. Kato, ed., Tokyo, Japan, pp. 45–49.
Revankar,  S. T., and Ishii,  M., 1992, “Local Interfacial Area Measurement in Bubbly Flow,” Int. J. Heat Mass Transfer, 35, pp. 913–925.
Van der Well,  R., 1985, “Void Fraction, Bubble Velocity and Bubble Size in Two-Phase Flow,” Int. J. Multiphase Flow, 11, pp. 317–345.
Kawanami,  Y., Kato,  H., Yamaguchi,  H., Tayaga,  Y., and Tanimura,  M., 1997, “Mechanism and Control of Cloud Cavitation,” ASME J. Fluids Eng., 119, pp. 788–794.
Fruman,  D., Reboud,  J. L., and Stutz,  B., 1999, “Estimation of Thermal Effects in Cavitation of Thermosensible Liquids,” Int. J. Mass Transfer, 42, pp. 3195–3204.

Figures

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Schematic diagram of the Venturi-type test section (dimensions are in mm)
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Schematic diagram of the interchangeable bottom of the Venturi-type test section (dimensions are in mm)
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Schematic diagram of the double optical probe (dimensions are in mm)
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Histograms of the local time fraction of the vapor phase β. X is the distance from the throat of the test section along the horizontal axis; Y is the distance from the throat of the test section along the vertical axis.
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Example of cross-correlation function Rab(t) of the optical probe signals
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Examples of velocity histograms
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Chord length lc of vapor structure
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Photograph of sheet cavitation
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Influence of the geometry and the roughness of the base on the relation between the cavity length Lcav and the cavitation number σ=(Pref−Pvap)/(0.5ρVref2). (Cavity length of 80 mm corresponds to cavitation number σref=0.31).
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Time average and standard deviation of the local time fraction of the vapor phase β within the cavity. Cavity length Lcav=80 mm; velocity in the upstream section Vref=12 m/s. The test section is equipped with the reference profile.
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Time average and standard deviation of the velocity. Cavity length Lcav=80 mm; velocity in the upstream section Vref=12 m/s. The test section is equipped with the reference profile.
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Time-averaged chord lengths lc of vapor structures within the cavity. Cavity length Lcav=80 mm; velocity in the upstream section Vref=12 m/s. The test section is equipped with the reference profile.
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Influence of the geometry and the roughness of the bottom on the spatial distribution of void fraction α and of time-average velocity within the cavity (cavity length Lcav=80 mm; velocity in the reference section Vref=12 m/s)
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Influence of the geometry and the roughness of the base on the distribution of the volume flow rate within the cavities. Cavity length Lcav=80 mm; velocity in the reference section Vref=12 m/s.Cq is the volume flow rate coefficient (×103).
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Partitioning of the cavity
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Influence of the geometry and the roughness of the base on the distribution of the momentum flux M within the cavities. Mean cavity length Lcav=80 mm; velocity in the reference section Vref=12 m/s.
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Influence of the geometry and the roughness of the base on the distribution of the skin friction drag F within the cavities. Cavity length Lcav=80 mm; velocity in the reference section Vref=12 m/s.

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