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Unsteady attached cavitation on an oscillating hydrofoil

Published online by Cambridge University Press:  21 April 2006

J. P. Franc  and
J. M. Michel
J. P. Franc
Affiliation:
Institute de Mécanique de Grenoble, Université de Grenoble, B. P. 68-38402, Saint-Martin-d'Hères Cédex, France
J. M. Michel
Affiliation:
Institute de Mécanique de Grenoble, Université de Grenoble, B. P. 68-38402, Saint-Martin-d'Hères Cédex, France
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Abstract

A series of visualizations of non-cavitating and cavitating unsteady flows around an oscillating hydrofoil has been carried out in order to investigate the effect of unsteadiness on attached cavitation. The major conclusion of the present experimental analysis is that the strong interaction that was previously pointed out in the case of steady cavitation between an attached cavity and the boundary layer which develops upstream cavity detachment, still plays a prominent role in unsteady cavitation. We propose to generalize for the case of unsteady attached cavitation the two following points which were initially established under steady conditions and which constitute a cavitation detachment criterion:

  1. a cavity detaches behind laminar separtion of the boundary layer;

  2. transition to turbulence sweeps away an attached cavity.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 193 , August 1988 , pp. 171 - 189
Copyright
© 1988 Cambridge University Press

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References

Alexander, A. J. 1968 An investigation of the relationship between flow separation and cavitation. N. P. L. Rep. November.Google Scholar
Arakeri, V. H. & Acosta, A. J. 1973 Viscous effects in the inception of cavitation on axisymmetric bodies. Trans. ASME I: J. Fluids Engng 95, 519–527.Google Scholar
Bark, G. & Van Berlekom, W. B. 1978 Experimental investigations of cavitation dynamics and cavitation noise. In Proc. 12th Symp. on Naval Hydrodyn. Washington DC, June 5-9, pp. 470–493. Natl Acad. Sciences.
Basu, B. C. & Hancock, G. J. 1978 The unsteady motion of a two-dimensional aerofoil incompressible inviscid flow. J. Fluid Mech. 87, 159–178.Google Scholar
Benjamin, T. B. 1964 Note on the interpretation of two-dimensional theories of growing cavities. J. Fluid Mech. 19, 137–144.Google Scholar
Franc, J. P. 1986 Etude physique d'écoulements cavitants. Thesis, Grenoble, France.
Franc, J. P. & Michel, J. M. 1985 Attached cavitation and the boundary layer: experimental investigation and numerical treatment. J. Fluid Mech. 154, 63–90.Google Scholar
Gates, E. M. & Acosta, A. J. 1978 Some effects of several freestream factors on cavitation inception of axisymmetric bodies. In Proc. 12th Symp. on Naval Hydrodyn. Washington DC, June 5-9, pp. 86–110. Natl Acad. Sciences.
Giesing, J. P. 1968 Non-linear two-dimensional unsteady potential flow with lift. J. Aircraft 5, 135–143.Google Scholar
Kruppa, C. F. L. & Sasse, G. R. 1982 Cavitation erosion tests with oscillating foil section. In Proc. 14th Symp. on Naval Hydrodyn. Washington DC, August 23-27.
McAlister, K. W. & Carr, L. W. 1979 Water tunnel visualizations of dynamic stall. Trans. ASME I: J. Fluids Engng, 101, 376–380.Google Scholar
McCroskey, W. J. 1982 Unsteady airfoils. Ann. Rev. Fluid Mech. 14, 285–311.Google Scholar
Rowe, A. & Kueny, J. L. 1980 Supercavitating hydrofoils with wetted upper sides. J. Méc. 19, 249–294.Google Scholar
Schlichting, H. 1959 Boundary Layer Theory. 4th edn. McGraw-Hill.
Shen, Y. T. & Gowing, S. 1986 Pressure measurements on an oscillating foil in fully wetted and cavitating conditions. In Proc. Intl Symp. on Cavitation, April 1986, Sendai, Japan (ed. H. Murai), pp. 95–102.
Shen, Y. T. & Peterson, F. B. 1978 Unsteady cavitation on an oscillating hydrofoil. In Proc. 12th Symp. on Naval Hydrodyn. Washington DC, June 5-9. Natl Acad. Sciences.
Shen, Y. T. & Peterson, F. B. 1980 The influence of hydrofoil oscillation on boundary layer transition and cavitation noise. In Proc. 13th Symp. on Naval Hydrodyn. Tokyo, October 6-10. pp. 221–241. Natl Acad. Sciences.
Van Der Meulen, J. H. J. 1980 Boundary layer and cavitation studies of NACA 16-012 and NACA 4412 hydrofoils. In Proc. 13th Symp. on Naval Hydrodyn. Tokyo, pp. 195–219. Natl Acad. Sciences.
Woods, L. C. 1964 On the theory of growing cavities behind hydrofoils. J. Fluid Mech. 19, 124–136.Google Scholar