Cavitation tunnel measurements have shown tip vortex cavitation inception is delayed when polymers are injected from the hydrofoil tip. Experiments with polymers have also shown that the polymers cause the cavitation to become more violent. To better understand the role of polymer in the delay of tip vortex cavitation, a theoretical analysis of tip vortex cavitation inception in pure water and in polymer solution is presented. The analysis shows that while polymer injection causes instability in small bubbles, its main effect is an increase in tip vortex core radius, resulting in the delay of tip vortex cavitation inception.

Issue Section:
Technical Papers
Keywords:
water, polymer solutions, vortices, cavitation, bubbles, flow instability, non-Newtonian flow
Topics:
Bubbles, Cavitation, Polymers, Wake turbulence, Water, Delays
1.
Fruman
,
D.
, and
Aflalo
,
S.
,
1989
, “
Tip Vortex Cavitation Inhibition by Drag Reducing Polymer Solution
,”
ASME J. Fluids Eng.
,
111
, pp.
211
–
216
.
2.
Fruman
,
D. H.
,
Pichon
,
T.
, and
Cerrutti
,
P.
,
1995
, “
Effect of Drag-Reducing Polymer Solution Ejection on Tip Vortex Cavitation
,”
SNAJ J. Marine Sci. Technol.
,
1
, pp.
13
–
23
.
3.
McCormick
,
W. B.
,
1962
, “
On Cavitation Produced by a Vortex Trailing From a Lifting Surface
,”
ASME J. Basic Eng.
,
84
, pp.
369
–
379
.
4.
Latorre
,
R.
,
1980
, “
Study of Tip Vortex Cavitation Noise From Foils and Propellers
,”
Int. Shipbuilding Prog.
,
27
, pp.
66
–
85
.
5.
Platzer, G. P., and Souders, W. G., 1981, “Tip Vortex Cavitation Characteristics-Delay on a Three Dimensional Hydrofoil,” Proc. 19th ATTC Meeting, Univ. of Michigan, Ann Arbor, pp. 989–1022.
6.
Green, I., Acosta J., and Akbar, R., 1988, “The Influence of Tip Geometry on Trailing Vortex Roll-up and Cavitation,” Proceedings 1988 ASME Cavitation and Multiphase Flow Forum, FED 64, pp. 76–80.
7.
Shima, A., and Tsujino, T., 1994, “The Dynamics of Cavity Clusters in Polymer Aqueous Solutions Subject to an Oscillating Pressure,” Proc. Bubble Dynamics and Interface Phenomena, Kluwer Academic Publications, Dordrecht, Netherlands, pp. 81–92.
8.
Latorre
,
R.
, and
Ligneul
,
P.
,
1993
, “
Acoustic Considerations in Tip Vortex Cavitation Inception
,”
Acustica
,
79
, pp.
266
–
273
.
9.
Levkovskii, Y. L., 1978, Structure of Cavitation Flows, Sudostroyeniye, Leningrad, pp. 153, 203 (in Russian).
10.
Latorre
,
R.
, and
Ligneul
,
P.
,
1989
, “
Study of the Capture Noise of Spherical Nuclei in the Presence of Tip Vortex of Hydrofoils and Propellers
,”
Acustica
,
68
, pp.
1
–
13
.
11.
Ligneul
,
P.
, and
Latorre
,
R.
,
1993
, “
Study of Nuclei Distribution and Vortex Diffusion Influence on Nuclei Capture by a Tip Vortex and Nuclei Captive Noise
,”
ASME J. Fluids Eng.
,
115
, pp.
504
–
507
.
12.
Hoyt
,
J. W.
,
1976
, “
Effect of Polymer Additives on Jet Cavitation
,”
ASME J. Fluids Eng.
,
98
, pp.
106
–
112
.
Copyright © 2004
 by ASME
You do not currently have access to this content.