An Experimental Study of Tip Vortex Cavitation Inception in an Axial Flow Pump
The interaction of the blade tip with the casing
boundary layer and the leakage flow may lead to a kind of cavitation
namely tip vortex cavitation. In this study, the onset of tip vortex
cavitation was experimentally investigated in an axial flow pump.
For a constant speed and a fixed angle of attack and by changing the
flow rate, the pump head, input power, output power and efficiency
were calculated and the pump characteristic curves were obtained.
The cavitation phenomenon was observed with a camera and a
stroboscope. Finally, the critical flow region, which tip vortex
cavitation might have occurred, was identified. The results show that
just by adjusting the flow rate, out of the specified region, the
possibility of occurring tip vortex cavitation, decreases to a great
extent.
[1] R.Laborde, P.Chantrel, and M.Mory., "Tip clearance and tip vortex
cavitation in an axial flow pump", ASME J. Fluid. Eng., Vol.119, 1997.
[2] A.Nourbakhsh, A.Jaumotte, Ch.Hirsch, and H.B.Parizi., "Turbopumps
and Pumping Systems", Springer, 2008.
[3] K. J., Farrel and M. L., Billet, "A correlation of leakage vortex cavitation
in axial-flow pumps", ASME J. Fluid. Eng., Vol.116, 1994.
[4] S.Higashi., Y.Yoshida, and Y.Tsujimoto, "Tip leakage vortex cavitation
from the tip clearance of a single hydrofoil", JSME International
Journal, Series B, Vol.45, No.3, 2002.
[5] R.Lattore, J.Y.Billard, F.Mountan, and O.Roussel., "Bubble capture by
large hydrofoil tip vortex", CAV2001; Sessions A6.002.
[6] Ph.Couty, M.Farhat, and F.A.Vellan, "Physical investigation of a
cavitation vortex collapse", CAV2001; Sessions A6.003.
[1] R.Laborde, P.Chantrel, and M.Mory., "Tip clearance and tip vortex
cavitation in an axial flow pump", ASME J. Fluid. Eng., Vol.119, 1997.
[2] A.Nourbakhsh, A.Jaumotte, Ch.Hirsch, and H.B.Parizi., "Turbopumps
and Pumping Systems", Springer, 2008.
[3] K. J., Farrel and M. L., Billet, "A correlation of leakage vortex cavitation
in axial-flow pumps", ASME J. Fluid. Eng., Vol.116, 1994.
[4] S.Higashi., Y.Yoshida, and Y.Tsujimoto, "Tip leakage vortex cavitation
from the tip clearance of a single hydrofoil", JSME International
Journal, Series B, Vol.45, No.3, 2002.
[5] R.Lattore, J.Y.Billard, F.Mountan, and O.Roussel., "Bubble capture by
large hydrofoil tip vortex", CAV2001; Sessions A6.002.
[6] Ph.Couty, M.Farhat, and F.A.Vellan, "Physical investigation of a
cavitation vortex collapse", CAV2001; Sessions A6.003.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:49619", author = "Mohammad Taghi Shervani Tabar and Zahra Poursharifi", title = "An Experimental Study of Tip Vortex Cavitation Inception in an Axial Flow Pump", abstract = "The interaction of the blade tip with the casing
boundary layer and the leakage flow may lead to a kind of cavitation
namely tip vortex cavitation. In this study, the onset of tip vortex
cavitation was experimentally investigated in an axial flow pump.
For a constant speed and a fixed angle of attack and by changing the
flow rate, the pump head, input power, output power and efficiency
were calculated and the pump characteristic curves were obtained.
The cavitation phenomenon was observed with a camera and a
stroboscope. Finally, the critical flow region, which tip vortex
cavitation might have occurred, was identified. The results show that
just by adjusting the flow rate, out of the specified region, the
possibility of occurring tip vortex cavitation, decreases to a great
extent.", keywords = "Axial flow pump, Gap cavitation, Leakage vortex,
Tip vortex cavitation.", volume = "5", number = "1", pages = "1-4", }