Continuing Experimental Studies of the Hydrodynamic Characteristics of Bluff Symmetrical Fairing Sections

Abstract

An experimental wind tunnel investigation was conducted to determine the hydrodynamic characteristics of bluff symmetrical sections with high thickness/chord ratios. The sections may be 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 sections tested were based on a family known as JFS-62M-TR mod with thickness/chord ratios of 0.25, 0.30, 0.35 an 0.40. Measurements included the two-dimensional profile drag coefficient, chordwise neutral stability point, and boundary layer transition and separation locations. Keywords: Bluff bodies; GHR(General Hydromechanics Research).

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA179301

Entities

People

  • D. E. Calkins
  • M. A. Wyszkowski

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boundary Layer
  • Dynamic Pressure
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Geometric Forms
  • Geometry
  • Layers
  • Lines (Geometry)
  • Pressure Distribution
  • Reynolds Number
  • Static Pressure
  • Three Dimensional
  • Turbulence
  • Turbulent Boundary Layer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Fluid Mechanics and Fluid Dynamics.