STUDY ON STERN SHAPES WITH MULTI-SCREW PROPELLERS

From 1972 to 1977, a research and development study was conducted for a container-ship to fill the following requirements: average speed 34.6 knots; length b.p. 300m; container capacity 3,000; and machinery output about 250,000 hp. The Authors give a detailed account of that part of the study dealing with stern shapes and different propeller arrangements. Three different stern forms (two U-type and one V-type) and various quadruple and triple screw arrangements were model-tested, resistance and self-propulsion tests and wake surveys being carried out. It was concluded that:--1. The resistance of the appendage amounts to about 20% of the total resistance of the model. The problem of ship/model correlation for the appendages should be solved in detail for the actual ship. 2. Propulsive performance with triple screws is better than that with quadruple screws. The adoption of a contra-rotating propeller, instead of a conventional centre propeller, in the triple-screw arrangement gives the best propulsive performance. Several other conclusions are drawn, and it is estimated that, at 34.6 knots, the ship would require 235,000 dhp with quadruple screws, 222,000 dhp with triple screws, and 218,000 dhp with triple screws with contra-rotating propellers in the centre position. Order from BSRA as No. 52,438.

  • Corporate Authors:

    Ship Research Institute, Tokyo

    38-1, 6-chome, Shinkawa, Mitaka-shi
    Tokyo,   Japan 
  • Authors:
    • Kawakami, Y
    • Ueda, T
  • Publication Date: 1978-11

Language

  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00310904
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM