LOADING ON A CYLINDER IN UNIFORM OSCILLATORY FLOW: PART I - PLANAR OSCILLATORY FLOW

Loading on a smooth circular cylinder at high Reynolds numbers in planar oscillatory flow has been studied by driving the cylinder with simple harmonic motion through water initially at rest. The development of the experiment, capable also of arbitrary 2-D oscillatory motion, is described with particular attention to the steps taken to eliminate undesirable mechanical vibrations. Results are presented over the range of conditions, Reynolds numbers in the range 20,000 to 280,000 and Keulegan Carpenter numbers from 6 to 20. For the lower Keulegan Carpenter numbers, drag and inertia coefficients follow a reasonable extension of Sarpkaya's U-tube data. Comparison with large scale wave experiments highlights the effects of differences between planar oscillatory flow and wave-induced flow. In some respects, however, such as the magnitude of local transverse forces, agreement between measurements in these different conditions are in surprising agreement.

• Supplemental Notes:
  • Appl. Ocean Res., 10 (1988), p. 120 (July) [9 pp., 7 ref., 12 fig., 1 phot.]
• Authors:
  • Chaplin, J R
• Publication Date: 1988

Language

• English

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Mathematical oscillations; Vortex shedding
• Old TRIS Terms: Wave loads
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00694120
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM