A NOTE ON THE DECAY OF BODY-INDUCED HYDRODYNAMIC DISTURBANCES IN A TOWING TANK

The decay characteristics of disturbances generated from towing an axisymmetric body in a towing tank are estimated. The intensities of the mean velocity defect in a turbulent wake, wake turbulence, and a turbulent two-dimensional line vortex are estimated to be respectively of the order of .01 x U and .001 x U at 32 and 320 seconds, after the passage of a body which is 20 inches (50 cm) in diameter and towed at U = 50 ft.sec (15 m/s). Sample calculations of the influence of flow disturbances in altering the body's axisymmetric pressure distribution are included. (Author)

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Ship Performance Department
  Bethesda, MD  United States  20084
• Authors:
  • Chang, M S
• Publication Date: 1977-6

Media Info

• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Container tanks; Damping (Physics); Hydrodynamics; Pressure; Towing devices; Turbulence; Two dimensional flow; Vortices; Wakes
• Uncontrolled Terms: Pressure distribution
• Old TRIS Terms: Asymmetric bodies; Decay schemes; Disturbances; Towed bodies; Towing tanks; Wake analysis
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00167161
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SPD-781-01 Final Rpt.
• Files: TRIS
• Created Date: Nov 23 1978 12:00AM