Abstract
Stable attached partial cavitation in separated flows can transition to cloud shedding, and the mechanism of transition has been attributed to the presence of a re-entrant liquid jet. Our findings have revealed the presence of propagating bubbly shock waves as an alternative dominant mechanism of shedding when the compressibility of the bubbly mixture is appreciable. In the present paper, we discuss dynamics associated with these bubbly shock waves, interaction of shock waves with obstacles in their path, and means to manipulate their properties to control the shedding process by non-condensable gas injection.
Similar content being viewed by others
References
Franc J. P., Michel J. M. Fundamentals of cavitation [M]. Dordrecht, The Netherlands: Springer, 2006.
Hutton S. P., Furness S. P. Experimental and theoretical studies of two-dimensional fixed-type cavities [J]. Journal of Fluids Engineering, 1975, 97: 515–522.
Lush P. A., Skipp S. R. High speed cine observations of cavitating flow in a duct [J]. International Journal of Heat and Fluid Flow, 1986, 7 (4): 283–290.
Le Q., Franc J. P., Michel J. M. Partial cavities: Global behavior and mean pressure distribution [J]. Journal of Fluids Engineering, 1993, 115 (3): 243–248.
De Lange D. F., De Bruin G. J. Sheet cavitation and cloud cavitation, re-entrant jet and three-dimensionality [J]. Applied Scientific Research, 1997, 58 (1–4): 191–114.
Callenaere M., Franc J. P., Michel J. M. et al. The cavitation instability induced by the development of a re-entrant jet [J]. Journal of Fluid Mechanics, 2001, 444: 223–256.
Laberteaux K. R., Ceccio S. L. Partial cavity flows. Part 1. Cavities forming on models without spanwise variation [J]. Journal of Fluid Mechanics, 2001, 431: 1–41.
Gopalan S., Katz J. Flow structure and modeling issues in the closure region of attached cavitation [J]. Physics of fluids, 2000, 12 (4): 895–911.
Ganesh H., Mäkiharju S. A., Ceccio S. L. Bubbly shock propagation as a mechanism for sheet-to-cloud transition of partial cavities [J]. Journal of Fluid Mechanics, 2016, 802: 37–78.
Mäkiharju S. A., Gabillet C., Paik B. et al. Time-resolved two-dimensional X-ray densitometry of a two-phase flow downstream of a ventilated cavity [J]. Experiments in fluids, 2013, 54 (7): 1–21.
Crespo A. Sound and shock waves in liquids containing bubbles [J]. Physics of Fluids, 1969, 12 (11): 2274–2282.
Brennen C. E. Fundamentals of multiphase flow [M]. Cambridge, UK: Cambridge University Press, 2005.
Gnanaskandan A., Mahesh K. Large eddy simulation of the transition from sheet to cloud cavitation over a wedge [J]. International Journal of Multiphase Flow, 2016, 83: 86–102.
Budich B., Schmidt S., Adams N. A. Numerical investigation of condensation shocks in cavitating flow [C]. Proceedings of the 31st Symposium of Naval Hydrodynamics. Monterey, California, USA, 2016.
Wu X., Etienne M., Chahine G. L. An experimental study of sheet to cloud cavitation [J]. Experimental Thermal and Fluid Science, 2017, 83: 129–140.
Shamsborhan H., Coutier-Delgosha O., Caignaert G. et al. Experimental determination of the speed of sound in cavitating flows [J]. Experiments in Fluids, 2010, 49 (6): 1359–1373.
Tomov P., Khelladi S., Ravelet F. et al. Experimental study of aerated cavitation in a horizontal venturi nozzle [J]. Experimental Thermal and Fluid Science, 2016, 70: 85–95.
Mäkiharju S. A., Ganesh H., Ceccio S. L. The dynamics of partial cavity formation, shedding and the influence of dissolved and injected non-condensable gas [J]. Journal of Fluid Mechanics, 2017, 829: 420–458.
Kawanami Y., Kato H., Yamaguchi H. et al. Mechanism and control of cloud cavitation [J]. Journal of Fluids Engineering, 1997, 119 (4): 788–794.
Ganesh H. Bubbly shock propagation as a cause of sheet to cloud transition of partial cavitation and stationary cavitation bubbles forming on a delta wing vortex [D]. Doctoral Thesis, Ann Arbor, USA: University of Michigan, 2015.
Liepmann H. W., Roshko A. Elements of gasdynamics [R]. Courier Corporation, 1957.
Ganesh H., Wu J., Ceccio S. L. Investigation of shedding dynamics on NACA0015 hydrofoil using time-resolved X-ray densitometry [C]. Proceedings of the 31st Symposium of Naval Hydrodynamics. Monterey, California, USA, 2016.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ganesh, H., Mäkiharju, S. & Ceccio, S. Bubbly shock propagation as a mechanism of shedding in separated cavitating flows. J Hydrodyn 29, 907–916 (2017). https://doi.org/10.1016/S1001-6058(16)60805-3
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1016/S1001-6058(16)60805-3