FORCES ON SUBMARINE PIPELINES FROM STEADY CURRENTS

This paper briefly reviews the hydrodynamics of forces on a submerged body in a steady flow and of turbulent boundary layers. Dimensional analysis is used to formulate three possible methods of data reduction for the forces on a circular cylinder resting on bottom in a turbulent boundary layer of a steady flow. Cylinder surface roughness, bottom roughness, cylinder diameter, height above bottom, and water velocity were varied in experiments conducted to measure the lift and drag forces on such a cylinder. The results were best correlated by using effective, or average, dynamic pressure over the diameter of the cylinder in the definition of force coefficients and Reynolds number. In the case of the cylinder resting on bottom, use of the average dynamic pressure makes the coefficients independent of the boundary-layer velocity profile. The author suggests use of the 1/7th power law for approximating the boundary-layer profile in the absence of accurate field measurements.

  • Supplemental Notes:
    • Presented at the ASME Petroleum Mech. Eng. Underwater Technology Conference, Houston, Tex., Sept. 19-23, 1971.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  USA  10016-5990
  • Authors:
    • Jones, W T
  • Publication Date: 1971-9-19

Media Info

  • Features: References;
  • Pagination: 21 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00034402
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Pap 71 Unt-3
  • Files: TRIS
  • Created Date: Sep 15 1974 12:00AM