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  USA  20810

    Office of Naval Research

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

Media Info

  • Pagination: 18 p.

Subject/Index Terms

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