LIFT EFFECTS ASSOCIATED WITH DRAG-REDUCING POLYMER INJECTION ON TWO-DIMENSIONAL HYDROFOILS

The effect of a boundary-layer injection of drag-reducing additive solutions on the lift and drag of a 10-cm chord, NACA 63A020 symmetrical two-dimensional hydrofoil was investigated for various freestream and injection velocities, foil incidences, and additive concentrations ranging from 50 to 400 ppm of POLYOX WSR 301. The experimental results demonstrate that the lift of the hydrofoil can either increase or decrease depending upon whether the polymer injection is made on the suction or pressure side of the foil surface, respectively. In both cases, however, the drag is reduced. The net result of the injection of the drag-reducing agent is an augmentation of the lift-drag ratio. The magnitude of this augmentation and its dependence on the freestream velocity, the injection velocity, the concentration of polymer, and the incidence of the foil are analyzed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00224502
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Fruman, D H
• Publication Date: 1976-9

Media Info

• Features: References;
• Pagination: p. 145-151
• Serial:
  • Journal of Ship Research
  • Volume: 20
  • Issue Number: 3
  • Publisher: Society of Naval Architects and Marine Engineers
  • ISSN: 0022-4502
  • EISSN: 1542-0604
  • Serial URL: https://onepetro.org/jsr

Subject/Index Terms

• TRT Terms: Boundary layer flow; Drag; Hydrofoils; Injection molding; Loads; Polymers
• Old TRIS Terms: Drag reduction; Hydrofoil loading; Polymer ejection systems
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00148188
• Record Type: Publication
• Source Agency: Society of Naval Architects and Marine Engineers
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM