An Experimental Investigation of the Two-Dimensional Hydrodynamic Characteristics of Bluff Symmetrical Fairing Sections
WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING
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An experimental wind tunnel investigation has been conducted to determine the hydrodynamic characteristics of bluff symmetrical sections with high thicknesschord 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 thicknesschord 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.
- Fluid Mechanics