Escort Tug Performance Prediction Using Computational Fluid Dynamics

In this paper, the authors outline and validate a computational fluid dynamics (CFD) method for determining the hydrodynamic forces of an escort tug in indirect towing mode. They consider a range of yaw angles from 0° to 90° and a travel speed of 8 knots. They discuss the effects of scaling on prediction of flow separation and hydrodynamic forces acting on the vessel by carrying out CFD studies on both model and full-scale escort tugs performing indirect escort maneuvers. As the escort performance in terms of maximum steering forces is strongly dependent on the onset of flow separation from the hull and skeg of the tug, the model-scale simulations under-predict the maximum steering force by 12% relative to the full-scale simulations. In addition, the authors provide a method for converting the hydrodynamic forces of the CFD escort study into towline and thrust forces.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00224502
• Supplemental Notes:
  • Abstract used with permission from the Society of Naval Architects and Marine Engineers (SNAME).
• Authors:
  • Smoker, Brendan
  • Stockdill, Bart
  • Oshkai, Peter
• Publication Date: 2016-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 61-77
• Serial:
  • Journal of Ship Research
  • Volume: 60
  • Issue Number: 2
  • Publisher: Society of Naval Architects and Marine Engineers
  • ISSN: 0022-4502
  • EISSN: 1542-0604
  • Serial URL: https://onepetro.org/jsr

Subject/Index Terms

• TRT Terms: Boundary layer separation; Fluid dynamics; Hydrodynamics; Tugboats
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 01602206
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 20 2016 10:27AM