Accession Number:

AD0672564

Title:

EFFECT OF BILGE KEELS AND A BULBOUS BOW ON BILGE VORTICES.

Descriptive Note:

Technical rept.,

Corporate Author:

IOWA UNIV IOWA CITY INST OF HYDRAULIC RESEARCH

Personal Author(s):

• Tatinelaux,Jean-Claude

Report Date:

1968-02-01

Pagination or Media Count:

32.0

Abstract:

Wind-tunnel experiments were performed in order to investigate the influence of bilge-keels and of a bulbous bow on the drag induced by vortices generated at the bilges of an ogive. It was found that as the ratio of the height of the keels to the maximum width of the ogive is increased from 0 to 0.08, the vortical drag increases from 2 to 11 percent of the surface drag. The presence of a bulbous bow does not appear to affect the vortical drag of a model with a fine entrance, such as the one studied other investigators claim the contrary when the form is that of a blunt oil tanker. Author

Descriptors:

• *SHIP HULLS
• *VORTICES
• DRAG
• OGIVES
• TANKER SHIPS
• SECONDARY FLOW
• KINETIC ENERGY
• SHIP MODELS

Subject Categories:

• Marine Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE