SPRAY DRAG OF SURFACE-PIERCING STRUTS

Spray drags were measured using a series of nine surface-piercing struts operated in fourteen configurations. Empirical equations were deduced and compared with earlier data. The strut surface-area wetted above the waterline by the spray sheet was determined from photographs of various configurations and used as evidence that the frictional drag of the spray sheet flowing over the strut was the primary source of the measured spray drag. The mass flow rate contained in the spray sheet was measured indirectly. Following these experiments horizontal spray rails were attached to three of the struts and produced significant reductions in the spray drag of each. (Author)

• Corporate Authors:

  Naval Undersea Research and Development Center

  San Diego, CA  United States 
• Authors:
  • Chapman, R B
• Publication Date: 1971-9

Media Info

• Pagination: 38 p.

Subject/Index Terms

• TRT Terms: Hydrofoils; Skin resistance; Struts
• Old TRIS Terms: Surface piercing hydrofoils
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00025658
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NUC-TP-251 R&D Rpt
• Files: TRIS
• Created Date: Feb 11 1972 12:00AM