An Experimental Investigation of the Two-Dimensional Hydrodynamic Characteristics of Bluff Symmetrical Fairing Sections

Abstract

An experimental wind tunnel investigation has been conducted to determine the hydrodynamic characteristics of bluff symmetrical sections with high thickness/chord ratios. The sections are used as fairings for circular cylindrical members, such as towing cables and offshore drilling rig riser pipes, which are deeply immersed in the ocean environment so that they are cavitation free. The fairings serve to reduce drag and lateral vibrations due to vortex shedding. The section tested had a 40 percent thickness/chord ratios. Measurements included the two dimensional minimum drag coefficient, chordwise neutral stability point, yaw torque about the pivot center, and boundary layer transition and separation.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1984
Accession Number
ADA170933

Entities

People

  • D. E. Calkins
  • D. L. Gray

Organizations

  • University of Washington

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boundary Layer
  • Boundary Layer Transition
  • Dynamic Pressure
  • Engineering
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Hydrodynamic Characteristics
  • Hydrodynamics
  • Measurement
  • Mechanical Engineering
  • Static Pressure
  • Turbulent Flow
  • Two Dimensional
  • Vortex Generators

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Electrical Engineering