EFFECT OF DRAG-REDUCING POLYMER INJECTION ON THE LIFT AND DRAG OF A TWO-DIMENSIONAL HYDROFOIL

The present paper describes an experimental investigation on the effects of injecting drag-reducing polymer solutions into the turbulent boundary layer of two NACA 63, two-dimensional, symmetrical, hydrofoils. The experiments were performed in a high-speed circulating channel with free stream velocities of up to 13 m/sec. The two foils used were 10 and 20 cm in chord, though both had a maximum thickness of 2 cm. The incidence of the foils varied between plus or minus 5 degrees with the ratios of the injection to free stream velocity of up to 0.2, and a concentration of poly(ethylene oxide), POLYOX WSR 301, of 200 ppm. The injection slits on both foils are situated one-tenth of a chord downstream of the leading edge. The gap of the injection slit was 0.0127 cm for the small foil and twice this value for the larger foil. (Modified author abstract)

• Corporate Authors:

  Hydronautics, Incorporated

  7210 Pindel School Road
  Laurel, MD  United States  20810

  Office of Naval Research

  Department of the Navy, 800 North Quincy Street
  Arlington, VA  United States  22217
• Authors:
  • Fruman, D H
  • Sundaram, T R
  • Daugard, S J
• Publication Date: 1974-9

Media Info

• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Additives; Drag; Hydrofoils; Injection molding; Polymers
• Old TRIS Terms: Drag reduction; Polymer additives; Polymer ejection systems
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00095105
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TR-7101-r Tech Rpt.
• Contract Numbers: N00014-71-C-0063
• Files: TRIS
• Created Date: May 29 1975 12:00AM