An experimental study is made of two-dimensional uniform-shear flow (U = Uc + Gy) past a rotating cylinder of diameter D. A water-tunnel, equipped with a shear generator, was constructed. Laser-Doppler velocity measurements were undertaken to describe the wake characteristics. Data are compiled over the ranges of 600≤Re≤1,200, the shear parameter K[≡GD/Uc] up to 0.15, and the value of the cylinder rotation parameter α[≡ωD/2Uc], – 2.0≤α≤2.0. The power spectra of velocity measurements at downstream locations were analyzed to examine the vortex shedding patterns. In general, the dominant shedding frequency is shifted to a higher value as |α| and K increase. When |α| increases beyond a certain threshold value, the dominant frequency becomes less distinct. If |α| takes a value larger than around 1.5, the velocity field becomes randomized and diffuse, and the organized Karman vortex street activity weakens. The variations of the Strouhal number with K and α are described. The evolution of mean velocity profiles in the wake field is depicted. Characterizations of the velocity profiles, as K and α vary, are made based on the measurement data.

1.
Badr
H. M.
, and
Dennis
S. C. R.
,
1985
, “
Time-Dependent Viscous Flow Past an Impulsively Started Rotating and Translating Circular Cylinder
,”
Journal of Fluid Mechanics
, Vol.
158
, pp.
447
488
.
2.
Badr
H. M.
,
Coutanceau
M.
,
Dennis
S. C. R.
, and
Menard
C.
1990
, “
Unsteady Flow Past a Rotating Circular Cylinder at Reynolds Numbers 103 and 104
,”
Journal of Fluid Mechanics
, Vol.
220
, pp.
459
484
.
3.
Coutanceau
M.
, and
Menard
C.
,
1985
, “
Influence of Rotation on the Near-Wake Development Behind an Impulsively Started Circular Cylinder
,”
Journal of Fluid Mechanics
, Vol.
158
, pp.
399
446
.
4.
Diaz
F.
,
Gavalda
J.
,
Kawall
J. G.
,
Keffer
J. F.
, and
Giralt
F.
,
1983
, “
Vortex Shedding from a Spinning Cylinder
,”
Physics of Fluids
, Vol.
26
, No.
12
, pp.
3454
3460
.
5.
Diaz
F.
,
Gavalda
J.
,
Kawall
J. G.
,
Keffer
J. F.
, and
Giralt
F.
,
1985
, “
Asymmetrical Wake Generated by a Spinning Cylinder
,”
AIAA Journal
, Vol.
23
, pp.
49
54
.
6.
Friehe
C. A.
,
1980
, “
Vortex Shedding from Cylinders at Low Reynolds Number
,”
Journal of Fluid Mechanics
, Vol.
100
, pp.
237
241
.
7.
Jordan
S. K.
, and
Fromm
J. E.
,
1972
, “
Laminar Flow Past a Circle in a Shear Flow
,”
Physics of Fluids
, Vol.
15
, pp.
972
976
.
8.
Kimura
T.
,
Tsutahara
M.
, and
Wang
Z. Y.
,
1992
, “
Wake of a Rotating Circular Cylinder
,”
AIAA Journal
, Vol.
30
, No.
2
, pp.
555
556
.
9.
Kiya
M.
,
Tamura
H.
, and
Arie
M.
,
1980
, “
Vortex Shedding from a Circular Cylinder in Moderate-Reynolds Number Shear Flow
,”
Journal of Fluid Mechanics
, Vol.
101
, part 4, pp.
721
735
.
10.
Kwon
T. S.
,
Sung
H. J.
, and
Hyun
J. M.
,
1992
, “
Experimental Investigation of a Uniform-Shear Flow Past a Circular Cylinder
,”
Trans. ASME
, Vol.
114
, pp.
457
460
.
11.
Lee
D. H.
, and
Sung
H. J.
,
1994
, “
Assessment of Turbulent Spectral Bias in LDV
,”
Experiments in Fluids
, Vol.
16
, pp.
223
235
.
12.
Massons
J.
,
Ruiz
X.
, and
Diaz
F.
,
1989
, “
Image Processing of the Near Wakes of Stationary and Rotating Cylinders
,”
Journal of Fluid Mechanics
, Vol.
204
, pp.
167
184
.
13.
Moore
D. W.
,
1957
, “
The Flow Past a Rapidly Rotating Circular Cylinder in a Uniform Stream
,”
Journal of Fluid Mechanics
, Vol.
2
, pp.
541
550
.
14.
Richter
A.
, and
Naudascher
E.
,
1976
, “
Fluctuating on a Rigid Circular Cylinder in Confined Flow
,”
Journal of Fluid Mechanics
, Vol.
78
, part 3, pp.
561
576
.
15.
Roshko, A., 1954, “On the Development of Turbulent Wakes from Vortex Streets,” NACA Report 1191.
16.
Swanson, W. M., 1961, “The Magnus Effect: A Summary of Investigations to Date,” ASME Journal of Basic Engineering, pp. 461–470.
17.
Wiliamson
C. H. K.
,
1989
, “
Oblique and Parallel Modes of Vortex Shedding in the Wake of a Circular Cylinder at Low Reynolds Numbers
,”
Journal of Fluid Mechanics
, Vol.
26
, pp.
576
626
.
18.
Yoshino
F.
, and
Hayashi
T.
,
1984
, “
The Numerical Solution of Flow Around a Rotating Circular Cylinder in Uniform Shear Flow
,”
Bulletin of JSME
, Vol.
27
, No.
231
, pp.
1850
1857
.
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