Fluid Damping and Fluid Stiffness of a Tube Row in Crossflow

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

Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439

J. Pressure Vessel Technol 116(4), 370-383 (Nov 01, 1994) (14 pages) doi:10.1115/1.2929604 History: Received March 11, 1994; Revised June 23, 1994; Online June 17, 2008


Motion-dependent fluid forces acting on a tube array were measured as a function of excitation frequency, excitation amplitude, and flow velocity. Fluid-damping and fluid-stiffness coefficients were obtained from measured motion-dependent fluid forces as a function of reduced flow velocity and excitation amplitude. The water channel and test setup provide a sound facility for obtaining key coefficients for fluidelastic instability of tube arrays in crossflow. Once the motion-dependent fluid-force coefficients have been measured, a reliable design guideline, based on the unsteady flow theory, can be developed for fluidelastic instability of tube arrays in crossflow.

Copyright © 1994 by The American Society of Mechanical Engineers
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