In-line and transverse forces on smooth and rough cylinders in oscillatory flow at high Reynolds numbers
By: Turgut Sarpkaya
Contributors: Naval Postgraduate School (U.S.). Dept. of Mechanical Engineering
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1986
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 173
Subjects: UNSTEADY FLOW; HYDRODYNAMICS; OSCILLATION
Other titles: NPS-69-86-003.
Description: This report presents the results of an extensive experimental investigation of the in line and      transverse forces acting on smooth, sand roughened, and marine roughened circular cylinders      (k/D = 1/50) of identical length to diameter ratio (L/D = 2) placed in a sinusoidally oscillating      flow. The drag, inertia, and the maximum force coefficients have been determined through the      use of the Fourier analysis. The transverse force (lift) has been analysed in terms of its root      mean square value. In addition, the amplitude of the first ten harmonics have been determined.      The results are presented in both graphical and tabulated form in terms of the Reynolds      number, Keulegan Carpenter number, relative roughness and the frequency parameter beta (=      Re/K). Keywords: Oscillating flow; Unsteady flow; Wave forces; Drag and inertia; and Time      dependent flow.
Notes: Cover title.

"NPS-69-86-003."

"4 July 1986."

Interim report for period July 1985 - July 1986."

AD A169 562.

Includes bibliographical references (p. 47-49).

NSF-CEE-8210264

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