WAKE AND THRUST DEDUCTION AT EXTREME PROPELLER LOADINGS FOR A SHIP RUNNING IN SHALLOW WATER

Wake and thrust deduction have been determined by tests in shallow water with a model of a 60,000-dwt bulk carrier. The experiments were carried out at several different speeds, both ahead and astern, and at different propeller revolutions. The following combinations have been studied: (a) Ship going ahead, Propeller going ahead, (b) Ship going astern, Propeller going ahead, (c) Ship going ahead, Propeller going astern, and (d) Ship going astern, Propeller going astern. Propeller diagrams have been prepared giving the thrust coefficient, torque coefficient, and resistance + tow-rope pull coefficient as functions of the advance number for all these combinations. The wake coefficient and the thrust deduction coefficient are also shown as functions of the advance number. Finally, manoeuvres nomograms for the model have been prepared together with a comparison of the expected stopping distances for the ship running in water of infinite and of restricted depth. Order from: BSRA as No. 48,344.

  • Corporate Authors:

    Royal Institution of Naval Architects, England

    10 Upper Belgrave Street
    London SW1X 8BQ,   England 
  • Authors:
    • Harvald, S A
  • Publication Date: 1977-7

Media Info

  • Features: References;
  • Pagination: 25 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00178199
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 19 1978 12:00AM