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TECHNICAL PAPERS

An Experimental Study of Unsteady Partial Cavitation

[+] Author and Article Information
Jean-Baptiste Leroux, Jacques André Astolfi, Jean Yves Billard

Ecole Navale/IRENAV, Institute de Recherche de l’Ecole Navale, BP 600, 29240 Brest-Armee, France

J. Fluids Eng 126(1), 94-101 (Feb 19, 2004) (8 pages) doi:10.1115/1.1627835 History: Received November 21, 2002; Revised June 30, 2003; Online February 19, 2004
Copyright © 2004 by ASME
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References

Le,  Q., Franc,  J. P., and Michel,  J. M., 1993, “Partial Cavities: Pressure Pulse Distribution Around Cavity,” ASME J. Fluids Eng., 115, pp. 249–254.
Franc, J. P., 2001, “Partial Cavity Instabilities and Re-Entrant Jet,” CAV2001 Fourth International Symposium on Cavitation, June 20–23, 2001, Pasadena, CA.
Furness,  R. A., and Hutton,  S. P., 1975, “Experimental and Theoretical Studies of Two-Dimensional Fixed-Type Cavities,” ASME J. Fluids Eng., Dec., pp. 515–522.
Stutz,  B., and Reboud,  L., 1997, “Experiments on Unsteady Cavitation,” Exp. Fluids, 22, pp. 191–198.
Kawanami,  Y., Kato,  H., Yamaguchi,  H., Tagaya,  Y., and Tanimura,  M., 1997, “Mechanism and Control of Cloud Cavitation,” ASME J. Fluids Eng., 119, pp. 788–794.
Pham,  T. M., Larrarte,  F., and Fruman,  D. H., 1999, “Investigation of Unstable Sheet Cavitation an Cloud Cavitation Mechanisms,” ASME J. Fluids Eng., 121, pp. 289–296.
Dang,  J., and Kuiper,  G., 1999, “Re-entrant Jet Modeling of Partial Cavity Flow on Two-Dimensional Hydrofoils,” ASME J. Fluids Eng., 121, pp. 773–780.
Callenaere,  M., Franc,  J. P., Michel,  J. M., and Riondet,  M., 2001, “The Cavitation Instability Induced by the Development of a Re-Entrant Jet,” J. Fluid Mech., 444, pp. 223–256.
Laberteaux,  K. R., and Ceccio,  S. L., 2001, “Partial Cavity Flows. Part 1. Cavities Forming on Models Without Spanwise Variation,” J. Fluid Mech., 431, pp. 1–41.
Kawanami, Y., Kato, H., Yamaguchi, H., and Maeda, M., 1995, “An Experimental Investigation of Flow Field Around Sheet Cavity on Foil Section,” private communication. Société hydrotechnique de France, Section cavitation, Réunion du 26 Oct., LEGI, Grenoble, France.
Gaster, M., 1969, “The Structure and Behavior of Laminar Separation Bubbles,” NPL Aero. Report No. 1181 (revised).
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Chahine, G. L., and Hsiao, C. T., 2000, “Modeling 3D Unsteady Sheet Cavities Using a Coupled UnRANS-BEN Code,” Proceedings of 23rd Symposium on Naval Hydrodynamics, Sept. 17–22, Val de Reuil, France.
Arndt, R. E. A., Song, C. C. S., Kjeldsen, M., He, J., and Keller, A., 2000, “Instability of Partial Cavitation: A Numerical/Experimental Approach,” Proceedings of 23rd Symposium on Naval Hydrodynamics, Sept. 17–22, Val de Reuil, France.
Watanabe,  S., Tsujimoto,  Y., and Furukawa,  A., 2001, “Theoretical Analysis of Transitional and Partial Cavity Instabilities,” ASME J. Fluids Eng., 123, pp. 692–697.
Astolfi,  J. A., Leroux,  J. B., Dorange,  P., Billard,  J. Y., Deniset,  F., and De la Fuente,  S., 2000, “An Experimental Investigation of Cavitation Inception and Development on a Two Dimensional Hydrofoil,” J. Ship Res., 44(4), pp. 259–269.
Leroux, J. B., Astolfi, J. A., and Billard, J. Y., 2001, “An Experimental Investigation of Partial Cavitation on a Two Dimensional Hydrofoil,” CAV2001 Fourth International Symposium on Cavitation, June 20–23, Pasadena, CA.
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Figures

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(a) Transducer mounting. (b) Location and nomenclature of the pressure transducers, filled symbol is on the pressure side. Units in millimeter.
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Example of pressure transducer calibration curve
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Aspect of the cavity. Flow is from the left.
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(a) (b) Measured lift and drag coefficient for the non cavitating flow, straight line on (a) is the theoretical value CL=0.1097(1−0.83τ)(α+2.35) (inviscid unbounded calculation with viscous corrections, 18). (c) Lift to drag ratio for various cavity lengths, labels are the mean relative cavity lengths (see also Table 2).
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Pressure coefficient for the noncavitating flow, α=6.5 deg
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Pressure coefficient for various cavity lengths, (a) (b) (c) stable cavity, (d) unstable cavity (l/c>0.5). Vertical bars are ±Prms/q.
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Pressure fluctuation intensity for various cavity lengths
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Power spectral density, dashed line is the noncavitating flow, σ=1.34, l/c∼0.4
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Photographs of partial cavitation during cavity growth/destabilization cycle. Time between two consecutive images is 1/25e s.
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Instantaneous pressure signals during cavity growth/destabilization cycle, σ=1.25, C11 is the instantaneous pressure signals on the pressure side
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Spatial-time history of wall pressure in the cavity wake during cavity growth and vapor cloud shedding, σ=1.25. Figures on the left (resp. right) depict the sequence (a) (resp. (b)) on Fig. 10, filled symbol is transverse transducer C82.
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Spatial-time history of wall pressure during cavity destabilization and cloud cavitation (label (c) on Fig. 10), σ=1.25, dashed line is the noncavitating flow, filled symbols are transverse transducers C62 and C82
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Limit for which stable cavity transits to unstable cavity in the plane (σ,2(α−αo)). The dashed straight line is Arndt et al.’s criteria given by σ/2(α−αo)=4 (with αo=0). Angles are in radians.
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Variation of the angle of attack equivalent to the variation of the pressure on the pressure side during the growth/destabilization cycle, σ=1.25

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