An experimental investigation of artificial supercavitation generated by air injection behind disk-shaped cavitators
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In this paper, we investigated physical characteristics of an artificial supercavity generated behind an axisymmetric cavitator. Experiments for the same model were carried out at two different cavitation tunnels of the Chungnam National University and the University of Minnesota, and the results were compared and verified with each other. We measured pressures inside the cavity and observed the cavity formation by using a high-speed camera. Cavitation parameters were evaluated in considering blockage effects of the tunnel, and gravitational effects on supercavity dimensions were examined. Cavity dimensions corresponding to the unbounded cavitation number were compared. In addition, we investigated how artificial supercavitation develops according to the combination of injection positions and direction.
Abstract
In this paper, we investigated physical characteristics of an artificial supercavity generated behind an axisymmetric cavitator. Experiments for the same model were carried out at two different cavitation tunnels of the Chungnam National University and the University of Minnesota, and the results were compared and verified with each other. We measured pressures inside the cavity and observed the cavity formation by using a high-speed camera. Cavitation parameters were evaluated in considering blockage effects of the tunnel, and gravitational effects on supercavity dimensions were examined. Cavity dimensions corresponding to the unbounded cavitation number were compared. In addition, we investigated how artificial supercavitation develops according to the combination of injection positions and direction.
참고문헌 (14)
- Brennen, C., "A numerical solution of axisymmetric cavity flows", J. Fluid Mech, 37(4), pp.671~688 (1969)
- Kalikov, V. P., "Method of approximate account for the wall effect in cavitation flow around bodies in water tunnels", Fluid Dynamics, 1(4), pp.61~64 (1966)
- Karn, A., "Dependence of supercavity closure upon flow unsteadiness", Exp. Therm. Fluid Sci, 68, pp.493~498 (2015)
- Karn, A., "An experimental investigation into supercavity closure mechanisms", J. Fluid Mech, 789, pp.259~284 (2016)
- Kawakami, E., "Investigation of the behavior of ventilated supercavities", J. Fluids Eng, 133(9) (2011)
- Kim, J. -H., "Numerical simulation of supercavitating flows using a viscous-potential method", Proceedings of the 9th International Symposium on Cavitation (2015), EPFL
- Kinzel, M. P., "Air entrainment mechanics from artificial supercavities: insight based on numerical simulations", Proceedings of the 7th International Symposium on Cavitation (2009)
- Klose, G. J., "Some new measurements on the drag of cavitating disks", J. Ship Res, 9(2), pp.102~104 (1965)
- Cavitation, "Knapp, R. T.", University of Iowa, 188~201 (1979)
- Self, M., "Steady-state Cavity Studies in a Free-jet Water Tunnel", pp.47~ (1955), St. Anthony Falls Hydr. Laboratory
- Semenenko, V. N., "RTO AVT Lecture Series on Supercavitating Flows" (2001)
- Spurk, J. H., "On the gas loss from ventilated supercavities", Acta Mech, 155, pp.125~135 (2002)
- Tulin, M. P., "Handbook of Fluid Dynamics", pp.1224~1246 (1961), McGraw-Hill
- Water Tunnel Investigation of Two-dimensional Cavities, "Waid, R. L.", The Hydrodynamics Laboratory of California Institute of Technology, 4~, pp.E-73.4 (1957)