LARGE TANKERS-WIND COEFFICIENTS AND SPEED LOSS DUE TO WIND AND SEA

A research project is presented which concerns the effect of wind and sea on conventional tankers and bulk carriers in a deadweight range of 100,000-500,000 tonnes. The main part of the model test programme was carried out with a model of the 282,000 tonnes deadweight ore/oil carrier M/S SVEALAND. One reason for this choice was that fairly extensive full scale tests were planned for this ship. An essential part of the project was the determination of wind coefficients for modern tanker forms. These coefficients were obtained from wind tunnel tests and included tests with several different deckhouse configurations. The manoeuvring performance was investigated using simulation. Data for the simulations were obtained from the wind tunnel tests, planar motion mechanism tests and from special investigations of the effect of propeller loading on the rudder efficiency. The simulation resulted in predictions of speed loss, rudder deflection and course deviation for M/S SVEALAND under the influence of wind and sea. The results from the wind tunnel tests and the simulations have been generalized to apply to ships in the range 100,000 to 500,000 tonnes deadweight. A method for the prediction of speed loss due to wind and sea is indicated.

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  • Corporate Authors:

    Royal Institution of Naval Architects

    10 Upper Belgrave Street
    ,   USA 
  • Authors:
    • Van Berlekom, W B
    • Tragardh, P
    • Dellhag, A
  • Publication Date: 1975-1

Media Info

  • Features: References;
  • Pagination: p. 41-58
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00099468
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM