THE FREE-SURFACE BOW DRAG OF A TWO-DIMENSIONAL BLUNT BODY

The breaking wave in front of blunt bow displacement ships causes most of the wave resistance of such ships. A theoretical analysis of the two-dimensional gravity free-surface flow past a blunt body of semi-infinite length, representing a first approximation of the breaking wave, is presented. The jet model was selected for the representation of the bow momentum loss. The equations of flow are solved by a high draft froude number expansion. The velocity distribution, the jet thickness and the associated drag are computed by the aid of inner and outer expansions. The results are compared with Babas (1969) towing-tank tests.

• Corporate Authors:

  Hydronautics, Incorporated

  7210 Pindel School Road
  Laurel, MD  United States  20810
• Authors:
  • Dagan, G
  • Tulin, M P
• Publication Date: 1970

Media Info

• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Bluff bodies; Bow waves; Drag forces; Free surface; Wave resistance
• Old TRIS Terms: Free surface effects
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00015124
• Record Type: Publication
• Source Agency: Defense Documentation Center
• Report/Paper Numbers: TR-117-17
• Contract Numbers: NONR-3349(00)
• Files: TRIS
• Created Date: May 13 1973 12:00AM