THE WAKE VELOCITY AND RUDDER FORCE ON A TANKER SHIP MODEL

A propeller tunnel had been fitted to a 33,000 t (32,500 ton) bulk carrier to cure cavitation, vibration and noise problems occurring previously. However, the ship's masters reported that the propeller tunnel had reduced manoeuverability especially when operating at low speed in shallow water. From a series of wind tunnel tests with a model, a set of vortex generators was developed which improved the flow over the stern and increased the side force produced by the rudder. It is anticipated that fitting corresponding generators to the ship, together with the propeller tunnel and a 0.3 m (1 ft) extension to the rudder, will improve the manoeuverability compared with the original hull, when the rudder is set at an angle greater than 25 deg with a 0.9 m (3 ft) underkeel clearance, and greater than 12 deg in a deep sea. (Author)

  • Corporate Authors:

    Aeronautical Research Laboratories

    P.O. Box 4331, GPO, Dept of Defense
    Melbourne, Victoria 3001,   Australia 
  • Authors:
    • Matheson, N
  • Publication Date: 1978-5

Media Info

  • Pagination: 86 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00191550
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: ARL/AERO NOTE-376
  • Files: TRIS
  • Created Date: May 26 1979 12:00AM