From the flow measurement around the bow of a slowly moving ship it was found that, except in the thin boundary layer near the free surface, velocity components agree well with the calculated values from the double body potential. In the thin free surface layer the velocity components change depthwise very rapidly. Based on this experimental result an asymptotic formula to calculate wave resistance of slow ships is derived by assuming that the flow around the floating body can be expressed as a sum of two parts. One is the double body flow and the other is an additional thin free surface layer superposed on the double body flow. The formula includes a local nonlinearity around the body and gives better agreement with experiment than the conventional linearized wave resistance theories. Applications of the present theory to the hull form design are considered.

  • Corporate Authors:

    Mitsubishi Heavy Industries Limited

    5-1 Marunouchi, 2-chome, Chiyoda-Ku
    Tokyo 100,   Japan 
  • Authors:
    • Baba, E
  • Publication Date: 1976-8

Media Info

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Filing Info

  • Accession Number: 00156308
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 22 1977 12:00AM