Accession Number : AD0698291

Title :   BILGE VORTICES ALONG A SERIES-60 MODEL.

Descriptive Note : Technical rept.,

Corporate Author : IOWA UNIV IOWA CITY IOWA INST OF HYDRAULIC RESEARCH

Personal Author(s) : Tatinclaux,Jean-Claude

Report Date : JUL 1969

Pagination or Media Count : 16

Abstract : By measuring the velocity components by means of a five-hole directional probe, the secondary flow in the transverse plane at the stern of a Series-60 double model was investigated and shows the presence of a vortex. The drag induced by the bilge vortices is estimated to be equal to about9 two percent of the surface drag. The streamlines in the bow region are determined and permit one to conclude that the spiral motion which eventually develops into vortices begins at the bow. It is suggested that the influence of the shape of the bow on the flow pattern in the bow region be further investigated. (Author)

Descriptors :   (*SHIP HULLS, *VORTICES), SHIP MODELS, SECONDARY FLOW, DRAG, HYDRODYNAMICS, VELOCITY

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE