EFFECTS OF SURFACE ROUGHNESS ON SHIP DRAG PREDICTED
The drag characteristics of various surface roughnesses, investigated in tests at the David Taylor Naval Ship R&D Center (DTNSRDC), have been used to predict full-scale ship friction coefficient values. DTNSRDC tests utilized a flat-plate friction plane nd a rotating disk apparatus coated with paint-grit mixtures of different coarsenesses to represent varying degrees of roughness which might exist on full-scale ship hulls. A boundary-layer similarity-law- roughness characterization was determined from the measured torque on the rotating disk and the measured drag on the friction plane. In turn, these values obtained with the disk and friction plane were compared and used to predict full-scale ship friction coefficient values.
Navy Technology Transfer SheetNaval Surface Weapons Center
Dahlgren, VA United States 22448
- Publication Date: 1980-11
- Pagination: n.p.
- TRT Terms: Drag forces; Hulls; Roughness; Skin resistance
- Old TRIS Terms: Hull roughness
- Subject Areas: Marine Transportation; Materials; Vehicles and Equipment;
- Accession Number: 00324722
- Record Type: Publication
- Files: TRIS
- Created Date: Feb 18 1981 12:00AM