Effect of Drag-Reducing Polymer Injection on the Lift and Drag of a Two- Dimensional Hydrofoil

Abstract

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)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1974
Accession Number
ADA000262

Entities

People

  • D. H. Fruman
  • S. J. Daugard
  • T. R. Sundaram

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