VORTEX SHEDDING AND RESISTANCE IN HARMONIC FLOW ABOUT SMOOTH AND ROUGH CIRCULAR CYLINDERS AT HIGH REYNOLDS NUMBERS

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.

• Corporate Authors:

  Naval Postgraduate School

  1 University Circle
  Monterey, CA  United States  93943
• Authors:
  • Sarpkaya, T
• Publication Date: 1976-2-2

Media Info

• Pagination: 186 p.

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Roughness; Vortex shedding
• Old TRIS Terms: Lifting forces on pilings
• Subject Areas: Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00131610
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NPS-59SL76021 Intrm Rpt.
• Contract Numbers: NSF-AG-477
• Files: TRIS
• Created Date: Apr 21 1976 12:00AM