INFLUENCE ON STEERING FROM SPECIAL FLOW PHENOMENA ON FULL-BODIED SHIPS

Various types of unusual steering behaviour presumably related to various kinds of stern separation have been observed both in model- and full scale. Captive model tests have shown that separation may give rise to lateral forces of the same order of magnitude as forces from moderate rudder angles of say 3 to 5 deg. and therefore cannot be neglected. Although some progress has been made in an attempt to correlate hull main dimension and the adverse effects on steering, no clear design rules for avoiding these effects have been established. Scale effects on these phenomena are known to exist. However, more information is required before guidance can be given as to methods of scaling. It is recommended that the studies of these effects be continued. Such studies could consist of systematic series of a range of hull forms and involve free running and/or captive tests and flow studies.

• Supplemental Notes:
  • Presented at the 14th International Towing Tank Conference, 1975.
• Corporate Authors:

  National Research Council of Canada

  1200 Montreal Road
  Ottawa, Ontario  Canada  K1A 0R6
• Authors:
  • Smitt, L W
• Publication Date: 1975

Media Info

• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Boundary layer separation; Force; Rudders; Steering
• Uncontrolled Terms: Scale effect
• Old TRIS Terms: Model testing; Rudder forces; Steering dynamics
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00323697
• Record Type: Publication
• Source Agency: Stevens Institute of Technology
• Files: TRIS
• Created Date: May 21 1981 12:00AM