The effects of foil geometry on partial and transitional cavity oscillations were examined by experiments. The transitional cavity oscillation can be observed in the upstream pressure fluctuation for all foils and the amplitude of oscillation becomes larger when the maximum cavity length becomes larger than about 75% of the chord length. The Stroulal number based on the chord length correlated with the value of a parameter $σ∕2α$ and increased from 0.07 to 0.17 with the increase of $σ∕2α$ from 2.0 to 6.0 for all foils. For thicker foils, the partial cavity oscillation could not be detected in the upstream pressure fluctuation. However, semi-periodical cavity shedding corresponding to the partial cavity oscillation could be visually observed for all foils and the Strouhal number based on the mean cavity length was about 0.15–0.35 for all foils. Thus, the effect of foil geometry appears only in the strength of partial cavity oscillation.

1.
Sato
,
K.
,
,
M.
,
Monden
,
S.
, and
Tsujimoto
,
Y.
, 2002, “
Observation of Oscillating Cavitation on a Flat Plate Hydrofoil
,”
JSME Int. J., Ser. B
1340-8054,
45
(
3
), pp.
646
654
.
2.
Franc
,
J.-P.
, and
Michel
,
J.-M.
, 2004,
Fundamentals of Cavitation
,
Kluwer
, Dordrecht.
3.
Franc
,
J.-P.
, and
Schnerr
,
G. H.
, 2003,
Workshop on Physical Models and CFD Tools for Computation of Cavitating Flows
, 5th International Symposium on Cavitation, Osaka, http://flow.me.es.osaka-u.ac.jp/cav2003/http://flow.me.es.osaka-u.ac.jp/cav2003/
4.
Kjeldsen
,
M.
,
Arndt
,
R. E. A.
, and
Effertz
,
M.
, 2000, “
Spectral Characteristics of Sheet/Cloud Cavitation
,”
ASME J. Fluids Eng.
0098-2202,
122
, pp.
481
487
.
5.
Qin
,
Q.
, 2004, “
Numerical Modeling of Natural and Ventilated Cavitating Flows
,” Ph.D. dissertation, University of Minnesota.
6.
Kawanami
,
K.
,
Kato
,
H.
,
Yamaguchi
,
H.
,
Tanimura
,
M.
, and
Tagaya
,
Y.
, 1997, “
Mechanism and Control of Cloud Cavitation
,”
ASME J. Fluids Eng.
0098-2202,
119
, pp.
788
794
.
7.
Callenaere
,
M.
,
Franc
,
J.-P.
,
Michel
,
J.-M.
, and
Riondet
,
M.
, 2001, “
The Cavitation Instability Induced by the Development of a Reentrant Jet
,”
J. Fluid Mech.
0022-1120,
444
, pp.
223
256
.
8.
Watanabe
,
S.
,
Tsujimoto
,
Y.
, and
Furukawa
,
A.
, 2001, “
Theoretical Analysis of Transitional and Partial Cavity Instabilities
,”
ASME J. Fluids Eng.
0098-2202,
123
(
3
), pp.
692
697
.