A parametric study has been performed to investigate the effect of cylinder diameter on the acoustic resonance mechanism of two tandem cylinders exposed to cross-flow in a duct. Three spacing ratios corresponding to different flow regimes inside the “proximity interference” region are considered, LD=1.5, 1.75, and 2.5, where L is the spacing between the cylinders and D is the diameter. For each spacing ratio, six cylinder diameters in the range of D=7.627.5mm have been tested. For small diameter cylinders, the acoustic resonance mechanism of the tandem cylinders seems to be similar to that observed for single cylinders; i.e., it occurs near frequency coincidence as the vortex shedding frequency approaches that of an acoustic resonance mode. However, for larger diameter cylinders, the resonance of a given acoustic mode occurs over two different ranges of flow velocity. The first resonance range, the precoincidence resonance, occurs at flow velocities much lower than that of frequency coincidence. The second resonance range, the coincidence resonance, is similar to that observed for single and small diameter tandem cylinders. Interestingly, the observed precoincidence resonance phenomenon is similar to the acoustic resonance mechanism of in-line tube bundles. It is shown that increasing the diameter of the tandem cylinders affects several flow parameters such that the system becomes more susceptible to the precoincidence resonance phenomenon. The occurrence and the intensity of the precoincidence resonance are therefore strongly dependent on the diameter of the cylinders.

1.
Blevins
,
R. D.
, and
Bressler
,
M. M.
, 1993, “
Experiments on Acoustic Resonance in Heat Exchanger Tube Bundles
,”
J. Sound Vib.
0022-460X,
164
(
3
), pp.
503
533
.
2.
Oengoeren
,
A.
, and
Ziada
,
S.
, 1998, “
An In-Depth Study of Vortex Shedding, Acoustic Resonance and Turbulent Forces in Normal Triangle Tube Arrays
,”
J. Fluids Struct.
0889-9746,
12
, pp.
717
758
.
3.
Parker
,
R.
, and
Pryce
,
D. C.
, 1974, “
Wake Excited Resonances in an Annular Cascade: An Experimental Investigation
,”
J. Sound Vib.
0022-460X,
37
, pp.
247
261
.
4.
Ziada
,
S.
,
Oengoeren
,
A.
, and
Vogel
,
H.
, 2002, “
Acoustic Resonance in the Inlet Scroll of a Turbo-Compressor
,”
J. Fluids Struct.
0889-9746,
16
, pp.
361
373
.
5.
Parker
,
R.
, and
Stoneman
,
S. A. T.
, 1989, “
The Excitation and Consequences of Acoustic Resonances in Enclosed Fluid Flow Around Solid Bodies
,”
Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci.
0954-4062,
203
, pp.
9
19
.
6.
Welsh
,
M. C.
,
Hourigan
,
K.
,
Welch
,
L. W.
,
Downie
,
R. J.
,
Thompson
,
M. C.
, and
Stokes
,
A. N.
, 1990, “
Acoustics and Experimental Methods: The Influence of Sound on Flow and Heat Transfer
,”
Exp. Therm. Fluid Sci.
0894-1777,
3
, pp.
138
152
.
7.
Blevins
,
R. D.
, 1985, “
The Effect of Sound on Vortex Shedding From Cylinders
,”
J. Fluid Mech.
0022-1120,
161
, pp.
217
237
.
8.
Ziada
,
S.
, and
Oengoeren
,
A.
, 1992, “
Vorticity Shedding and Acoustic Resonance in an In-Line Tube Bundle, Part I: Vorticity Shedding
,”
J. Fluids Struct.
0889-9746,
6
, pp.
271
292
.
9.
Ziada
,
S.
, and
Oengoeren
,
A.
, 1993, “
Flow Structures in an In-Line Tube Bundle With Large Tube Spacings
,”
J. Fluids Struct.
0889-9746,
7
, pp.
661
687
.
10.
Oengoeren
,
A.
, and
Ziada
,
S.
, 1992, “
Vorticity Shedding and Acoustic Resonance in an In-Line Tube Bundle, Part I: Acoustic Resonance
,”
J. Fluids Struct.
0889-9746,
6
, pp.
293
302
.
11.
Lin
,
J. C.
,
Yang
,
Y.
, and
Rockwell
,
D.
, 2002, “
Flow Past Two Cylinders in Tandem: Instantaneous and Average Flow Structure
,”
J. Fluids Struct.
0889-9746,
16
(
8
), pp.
1059
1071
.
12.
Zdravkovich
,
M. M.
, 1985, “
Flow Induced Oscillations of Two Interfering Circular Cylinders
,”
J. Sound Vib.
0022-460X,
101
(
4
), pp.
511
521
.
13.
Igarashi
,
T.
, 1981, “
Characteristics of the Flow Around Two Circular Cylinders Arranged in Tandem (1st Report)
,”
JSME
0855-1146,
24
(
188
), pp.
323
331
.
14.
Hall
,
J. W.
,
Ziada
,
S.
, and
Weaver
,
D. S.
, 2003, “
Vortex Shedding From Single and Tandem Cylinders in the Presence of Applied Sound
,”
J. Fluids Struct.
0889-9746,
18
, pp.
741
758
.
15.
Mohany
,
A.
, and
Ziada
,
S.
, 2005, “
Flow-Excited Acoustic Resonance of Two Tandem Cylinders in Cross-Flow
,”
J. Fluids Struct.
0889-9746,
21
, pp.
103
119
.
16.
Blevins
,
R. D.
, 1990,
Flow-Induced Vibration
,
2nd ed.
,
Van Nostrand Reinhold
,
New York
.
17.
Ziada
,
S.
, and
Shine
,
S.
, 1999, “
Strouhal Numbers of Flow-Excited Acoustic Resonance in Side-Branches
,”
J. Fluids Struct.
0889-9746,
13
, pp.
127
142
.
18.
Rockwell
,
D.
, and
Naudascher
,
E.
, 1979, “
Self-Sustained Oscillations of Impinging Free Shear Layers
,”
Annu. Rev. Fluid Mech.
0066-4189,
11
, pp.
67
94
.
You do not currently have access to this content.