The use of impulse response functions for evaluation of added mass and damping coefficient of a circular cylinder oscillating in linearly stratified fluid

The use of impulse response functions for evaluation of added mass and damping coefficient of a...  The damped horizontal oscillations of a circular cylinder in linearly stratified fluid are studied experimentally. The cylinder is fixed to the lower end of a physical pendulum with variable restoring moment. The impulse response function of the pendulum in time domain is recorded and converted to the frequency response function using Fourier transform. The density stratification is shown to have a strong effect on frequency-dependent hydrodynamic coefficients (added mass and damping). The data obtained are compared with available theoretical predictions. The applicability of a simplicistic method implying approximation of impulse response functions by analytical functions is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

The use of impulse response functions for evaluation of added mass and damping coefficient of a circular cylinder oscillating in linearly stratified fluid

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Publisher
Springer-Verlag
Copyright
Copyright © 2000 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s003480050019
Publisher site
See Article on Publisher Site

Abstract

 The damped horizontal oscillations of a circular cylinder in linearly stratified fluid are studied experimentally. The cylinder is fixed to the lower end of a physical pendulum with variable restoring moment. The impulse response function of the pendulum in time domain is recorded and converted to the frequency response function using Fourier transform. The density stratification is shown to have a strong effect on frequency-dependent hydrodynamic coefficients (added mass and damping). The data obtained are compared with available theoretical predictions. The applicability of a simplicistic method implying approximation of impulse response functions by analytical functions is discussed.

Journal

Experiments in FluidsSpringer Journals

Published: Feb 9, 2000

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