Vortex shedding and resistance in harmonic flow about smooth and rough circular cylinders at high Reynolds numbers
By: by Turgut Sarpkaya
Contributors: Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1976
Place of publication: Monterey, California
Language: eng
Number of pages: 189
Subjects: Reynolds number; Fluid dynamics; Hydrodynamics; Vortex-motion
Description: This report presents the results on an extensive experimental investigation of the in-line and transverse forces acting on smooth and rough circular cylinders placed in oscillatory water flow at Reynolds numbers up to 700,000, Keulegan-Carpenter numbers up to 150, and relative roughnesses from 0.002 to 0.02. The drag and inertia coefficients have been determined through the use of the Fourier analysis and the least-squares method. The transverse force (lift) has been analyzed in terms of its maximum, semi-peak-to-peak, and root-mean-square values. In addition, the frequency of vortex shedding and the Strouhal number have been determined.
Notes: Title from cover.

"Prepared for: National Science Foundation, Washington, D.C. 20550."

"2 February 1976."

"NPS-59SL76021."

DTIC Identifiers: Smooth bodies, unsteady flow, Strouhal number, harmonic motion.

Author(s) key words: Oscillating flow, wave forces, drag and inertia coefficients, smooth and rough cylinders in harmonic flow.

Includes bibliographical references (p.181-183).

"Approved for public release; distribution is unlimited."

Technical report; 2 February 1976.

kmc/kmc oclc 8/25/09.