Publication:
A discrete-vortex analysis of flow about stationary and transversely oscillating circular cylinders

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Authors
Sarpkaya, Turgut
Shoaff, R. L.
Subjects
Hydroelastic Oscillations
Analysis of Transverse Oscillations
Cable Strumming
Discrete- Vortex Model.
Advisors
Date of Issue
1979-01
Date
1979-01
Publisher
Monterey, California. Naval Postgraduate School
Language
eng
Abstract
A comprehensive numerical model has been developed to investigate the characteristics of flow about a circular cylinder undergoing synchronized transverse oscillations. The model is based on the rediscretization of the shear layers, wake-boundary-layer interaction, and the dissipation of vorticity. The forces acting on the cylinder, rate of vorticity flux, Strouhal number, cylinder response, oscillations of the stagnation and separation points, longitudinal and transverse spacing of the vortices, and the base pressure have been calculated and shown to be in conformity with those obtained experimentally. The model has been used to predict the characteristics of hydroelastic oscillations of a cylinder in the range of synchronization. The numerical experiments shed considerable light on the interaction between the fluid motion in the wake and the dynamics of the body. An extensive sensitivity analysis has been carried out to determine the stability of all the parameters and hence the stability of the numerical model itself. (Author)
Type
Technical Report
Description
Series/Report No
Department
Identifiers
NPS Report Number
NPS-69SL79011
Sponsors
Prepared for: Civil Engineering Laboratory Naval Construction Battalion Center
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Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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