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.
- Presented at the ASME Petroleum Mech. Eng. Underwater Technology Conference, Houston, Tex., Sept. 19-23, 1971.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY USA 10016-5990
- Jones, W T
- Publication Date: 1971-9-19
- Features: References;
- Pagination: 21 p.
- TRT Terms: Boundary layer; Construction; Cylindrical bodies; Pipelines; Turbulence; Turbulent boundary layer; Underwater pipelines
- Old TRIS Terms: Pipeline construction
- Subject Areas: Construction; Marine Transportation; Pipelines; Terminals and Facilities;
- 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