Abstract
Measurements have been made of two dimensional motion of an elastically supported circular cylinder in the wake of a fixed upstream cylinder. The experiments were made in a water flow channel with diameter cylinders with a maximum Reynolds number of 77,000. The elastically supported downstream cylinder moves downward and inward toward the centerline of the upstream cylinder’s wake with increasing flow velocity, indicating the presence of a transverse lift force and reduced drag in the wake. These forces can cause the cylinders to clash. The measured motions correlate with the theory.
Issue Section:
Technical
Briefs
Keywords:
channel flow,
drag reduction,
flow instability,
flow measurement,
stratified flow,
turbulence,
wakes,
wake,
cylinder,
flow induced,
stability,
drag
1.
Blevins
, R. D.
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,” ASME J. Offshore Mech. Arct. Eng.
0892-7219, 127
, pp. 39
–45
. Note error in Eq. (2) of this paper—the second “)” from the left should appear after the “].”2.
Price
, S. J.
, and Paidoussis
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, 1984, “The Aerodynamic Forces Acting on Groups of Two and Three Cylinders When Subjected to a Cross Flow
,” J. Wind. Eng. Ind. Aerodyn.
0167-6105, 17
, pp. 329
–347
.Copyright © 2008
by American Society of Mechanical Engineers
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