ON THE MANOEUVRABILITY OF SHIPS WHILE STOPPING BY REVERSE ROTATION OF PROPELLER: 2ND REPORT

The Authors first examine the validity of the assumption (introduced in the 1st Report) that the hydrodynamic force caused by the reverse rotation of the propeller can be expressed by a simple linear equation for the equivalent side-slip velocity (Vs) at the stern, even when the ship has significant sway and yaw motions. From the analysis of experimental results, it is found that the expression of the unbalanced hydrodynamic forces as a linear equation of Vs ceases to be valid when the Vs value exceeds a certain limit that depends on the advance constant Jp. However, the Vs expression is still useful for determining the course stability when a ship is braked by reversing the propeller. In order to investigate the effectiveness of the mathematical model describing the hydrodynamic forces acting on a hull under the braking action of the propeller, the ship's trajectory and time histories of some state variables are calculated for various cases and compared with experimental results from a free-running model. Order from BSRA as No. 51,919.

  • Availability:
  • Corporate Authors:

    Kansai Zosen Kyokai, Osaka University

    Aza-yamadaue, Suitashi
    Osaka,   Japan 
  • Authors:
    • Fujino, M
    • Kirita, A
    • Nishihata, A
  • Publication Date: 1979-6

Language

  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00303890
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM