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RESEARCH PAPERS

Flow Velocity Dependence of Damping in Tube Arrays Subjected to Liquid Cross-Flow

[+] Author and Article Information
S. S. Chen, J. A. Jendrzejczyk

Components Technology Division, Argonne National Laboratory, Argonne, Ill. 60439

J. Pressure Vessel Technol 103(2), 130-135 (May 01, 1981) (6 pages) doi:10.1115/1.3263377 History: Received November 03, 1980; Online November 05, 2009

Abstract

Experiments are conducted to determine the damping for a tube in tube arrays subjected to liquid cross-flow; damping factors in the lift and drag directions are measured for in-line and staggered arrays. It is found that: 1) fluid damping is not a constant, but a function of flow velocity; 2) damping factors in the lift and drag directions are different; 3) fluid damping depends on the tube location in an array; 4) flow velocity-dependent damping is coupled with vortex shedding process and fluid-elastic instability; and 5) flow velocity-dependent damping may be negative. This study demonstrates that flow velocity-dependent damping is important. These characteristics should be properly taken into account in the mathematical modeling of tube arrays subjected to cross-flow.

Copyright © 1981 by ASME
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