This paper describes the interior acoustic pressure of a cylindrical cavity driven by a shear layer. Existing cavity flow literature is generally focused on rectangular cavities, where the resonance is either longitudinal or the result of excited depth modes inside the cavity. The design of the present circular cavity is such that azimuthal duct modes can be excited in various combinations with depth modes depending on free stream velocity. An acoustic simulation of the system was used to identify the modes as a function of frequency when the system is driven by an acoustic point source. With appropriate manipulation of the free stream flow, abrupt mode switching and mode oscillation were both observed, and a condition with a dominant azimuthal mode was found. The strength of the lock-on was documented for the various resonance conditions, and the effects of the cavity opening size and location were studied.

References

References
1.
Langtry
,
R. B.
, and
Spalart
,
P. R.
,
2008
, “
DES Investigation of a Baffle Device for Reducing Landing-Gear Cavity Noise
,”
46th AIAA Aerospace Sciences Meeting and Exhibit
,
Reno, NV
, Jan. 7–10.
2.
Balasubramanian
,
G.
,
Crouse
,
B.
, and
Freed
,
D.
,
2009
, “
Numerical Simulation of Leakage Effects on Sunroof Buffeting of an Idealized Generic Vehicle
,”
15th AIAA/CEAS Aeroacoustics Conference
,
Miami, FL
, May 11–13.
3.
Nakiboglu
,
G.
,
Belfroid
,
S. P. C.
,
Tonon
,
D.
,
Willems
,
J. F. J.
, and
Hirschberg
,
A.
,
2009
, “
A Parametric Study on the Whistling of Multiple Side Branch System as a Model for Corrugated Pipes
,”
Proceedings of the ASME 2009 Pressure Vessels and Piping Division Conference
,
Prague, Czech Republic
, July 26–30.
4.
Aly
,
K.
, and
Ziada
,
S.
,
2009
, “
Azimuthal Behavior of Self-Excited Diametral Modes of Internal Cavities
,”
Proceedings of the ASME 2009 Pressure Vessels and Piping Division Conference (PVP2009-77071)
,
Prague, Czech Republic
.
5.
Rockwell
,
D.
, and
Naudascher
,
E.
,
1978
, “
Review—Self-Sustaining Oscillations of Flow Past Cavities
,”
ASME J. Fluids Eng.
,
100
, pp.
152
165
.10.1115/1.3448624
6.
Rossiter
,
J. E.
,
1964
, “
Wind Tunnel Experiments on the Flow Over Rectangular Cavities at Subsonic and Transonic Speeds
,” Reports and Memoranda No. 3438.
7.
Yang
,
Y.
,
Rockwell
,
D.
,
Cody
,
K. L.-F.
, and
Pollack
,
M.
,
2009
, “
Generation of Tones Due to Flow Past a Deep Cavity: Effect of Streamwise Length
,”
J. Fluids Struct.
,
25
, pp.
364
388
.10.1016/j.jfluidstructs.2008.05.003
8.
Oshkai
,
P.
, and
Yan
,
T.
,
2008
, “
Experimental Investigation of Coaxial Side Branch Resonators
,”
J. Fluids Struct.
,
24
, pp.
589
603
.10.1016/j.jfluidstructs.2007.10.008
9.
Kook
,
H.
, and
Mongeau
,
L.
,
2002
, “
Analysis of the Periodic Pressure Fluctuations Induced by Flow Over a Cavity
,”
J. Sound Vib.
,
251
(
5
), pp.
823
846
.10.1006/jsvi.2001.4013
10.
Ma
,
R.
,
Slaboch
,
P. E.
, and
Morris
,
S. C.
,
2009
, “
Fluid Mechanics of the Flow-Excited Helmholtz Resonator
,”
J. Fluid Mech.
,
623
, pp.
1
26
.10.1017/S0022112008003911
11.
Hassan
,
M. E.
,
Labraga
,
L.
, and
Keirsbulck
,
L.
, 2-7 December
2007
, “
Aero-Acoustic Oscillations Inside Large Deep Cavities
,”
16th Australasian Fluid Mechanics Conference
,
Crown Plaza, Gold Coast, Australia
.
12.
Bennett
,
G. J.
,
O'Reilly
,
C.
,
Tapken
,
U.
, and
Fitzpatrick
,
J.
, 11-13 May
2009
, “
Noise Source Location in Turbomachinery Using Coherence Based Modal Decomposition
,”
15th AIAA/CEAS Aeroacoustics Conference
,
Miami, FL
.
13.
Bennett
,
G. J.
,
Verdugo
,
F. R.
, and
Stephens
,
D. B.
,
2010
, “
Shear Layer Dynamics of a Cylindrical Cavity for Different Acoustic Resonance Modes
,”
15th International Symposium on Applications of Laser Techniques to Fluid Mechanics
,
Lisbon, Portugal
, July 5–8, Paper No. 1727.
14.
Mendelson
,
R. S.
,
2003
, “
Methods of Measuring Lock-In Strength and Their Application to the Case of Flow Over a Cavity Locking Into a Single Sidebranch
,”
9th AIAA/CEAS Aeroacoustics Conference
,
Hilton Head, South Carolina
, May 12–14, AIAA Paper No. 2003-3106.
15.
Ruiz
,
G.
, and
Rice
,
H. J.
,
2002
, “
An Implementation of a Wave-Based Finite Difference Scheme for a 3-D Acoustic Problem
,”
J. Sound Vib.
,
256
(
2
), pp.
373
381
.10.1006/jsvi.2001.4218
16.
Bennett
,
G. J.
,
O'Reilly
,
C. J.
, and
Liu
,
H.
,
2009
, “
Modelling Multi-Modal Sound Transmission From Point Soucres in Ducts With Flow Using a Wave-Based Method
,”
16th Congress on Sound and Vibration
,
Kraków, Poland
, July 5–9.
17.
Verdugo
,
F. R.
,
2012
, “
Experimental Investigation of Flow Past Open and Partially Covered Cylindrical Cavities
,” Ph.D. thesis, Roma Tre, Italy.
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