Publication:
Forces on roughened cylinders in harmonic flow at high Reynolds numbers.

Loading...
Thumbnail Image
Authors
Evans, Steven R.
Subjects
in-line forces
oscillatory flow
harmonic flow about cylinders
rough cylinders
drag and inertia coefficients
lift coefficient
alternating force
wave forces
Advisors
Sarpkaya, T.
Date of Issue
1976-09
Date
September 1976
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The in-line forces acting on sand-roughened circular cylinders immersed in an harmonically oscillating flow have been measured using a U-shaped water tunnel. The drag and the inertia coefficients have been determined through the use of a Fourier analysis. These coefficients were found to depend on the Keulegan-Carpenter number, Reynolds number, and the relative roughness. The results have shown that roughness dramatically increases the transcritical drag coefficient. It is recommended that the experiments be extended to the self-excited hydroelastic oscillations of cylinders in harmonic flows as well as the problems related to wave slamming.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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.
Collections