Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division October 31, 2003; revised manuscript received July 7, 2004. Associate Editor: Georges L. Chahine.

The unsteady flow in and near cavity-type geometries, which belongs to a basic class of flow susceptible to self-excited oscillations, occurs in a variety of applications such as slotted-wall wind and water tunnels. Despite the diversity of types of cavity oscillations, several common features can be observed. According to the inducement cause of self-excited oscillations, Rockwell and Naudascher 1,2 categorized self-excited oscillations into three groups: (a) fluid-dynamic; (b) fluid-resonant; and (c) fluid-elastic. It is necessary to investigate the characteristics of self-excited oscillations in flow in order to utilize or avoid the self-excited oscillations in practical engineering situation.

Morel 3 experimentally studied a jet-driven Helmholtz oscillator. The amplitude...

1.
Rockwell
,
D.
, and
Naudascher
,
E.
,
1978
, “
Review—Self-Sustaining Oscillations of Flow Past Cavities
,”
ASME J. Fluids Eng.
,
100
, pp.
152
165
.
2.
Rockwell
,
D.
,
1977
, “
Prediction of Oscillation Frequencies for Unstable Flow Pas Cavities
,”
ASME J. Fluids Eng.
,
99
, pp.
294
300
.
3.
Morel
,
T.
,
1979
, “
Experimental Study of a Jet-Driven Helmholtz Oscillator
,”
ASME J. Fluids Eng.
,
101
, pp.
383
390
.
4.
Johnson, V. E., and Conn, A. F., 1982, “Self-Resonating Cavitating Jets,” Proceedings of the 6th International Symposium on Jet Cutting Technology, pp. 1–25.
5.
Chahine, G. L. et al., 1983, “Cleaning and Cutting With Self-Resonating Pulsed Water Jets,” Proceedings of the second US water jet conference, pp. 195–207.
6.
Liao, Z. F., Tang, C. L., and Wang, G. H., 1991, “A New Type of Nozzle for Oil Well Drill Bits,” Proceedings of the 10th International Conference on Jet Cutting Technology, pp. 135–144.
7.
Liao, Z. F., and Tang, C. L., 1987, “Theoretical Analysis and Experimental Study of the Self-Excited Oscillation Pulsed Jet Device,” Proceedings of the fourth US water jet conference, pp. 46–61.
8.
Shen, Z. H., Li, G. S., Wang, Z., and Xu, Y., 1991, “New Jet Theory and Prospects of Its Application in Drilling Engineering,” 13th World Petroleum Congress, pp. 397–405.
9.
Williams
,
M.
,
1992
, “
A Helmholtz Pressure Equation Method for the Calculation of Unsteady Incompressible Viscous Flows
,”
Int. J. Numer. Methods Heat Fluid Flow
,
14
, pp.
1
12
.
10.
Zhu, Z., and Strokes, N., 1997, “Simulation of Two-Phase Flows in a Stirred Mixing Tank,” Inter Conf on CFD in Mineral & Metal Processing and Power Generation, pp. 387–394.
11.
Samis, S., and Anderson, C., 1984, “Helmhotz Oscillator for the Self-Modulation of a Jet,” Proceedings of the 7th International Symposium on Jet Cutting Technology, pp. 91–98.
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