Accession Number : ADA019786

Title :   Hydrodynamic and Structural Effects on Faired Towcable Kiting.

Descriptive Note : Research and development rept.,

Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s) : Cox,Bruce D.

Report Date : DEC 1975

Pagination or Media Count : 33

Abstract : A theory for faired towcable kiting is presented. Geometric relationships and equilibrium equations are derived based on a thin elastic rod-high aspect ratio hydrofoil analytical model. The fairing section is characterized by torsional and flexural rigidities and hydrodynamic lift, drag, and moment coefficients. The presence of asymmetry (camber) also is accounted for. Predictions of towing configurations are presented. It is shown that small angles of attack (.15 degrees) can result in kits angles up to 60 degrees and catenary depth losses of 10 to 15 percent. Remarkably small camber (.1 percent of chord) is sufficient to cause significant kiting. Stability criteria are developed based on an analysis of the torsional buckling problems associated with the structural rigidities. The results have important implications in the design of towcable strength members and fairings. (Author)

Descriptors :   *Towing cables, *Hydrodynamics, *Hydrofoils, Torsion, Flexural properties, Aspect ratio, Drag, Lift, Moments, Stability, Stresses, Angle of attack, Buckling, Strength(Mechanics), Rigidity, Fairings, Elastic properties, Models

Subject Categories : Surface Transportation and Equipment
      Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE