AN EXPERIMENTAL INVESTIGATION OF WALL EFFECTS OF SUPERCAVITATING HYDROFOILS OF FINITE SPAN

A geometrically similar family of three half-span, elliptical-planform, supercavitating hydrofoils was tested in the M.I.T. variable-pressure water tunnel. Lift, drag, moment, tunnel speed, ambient pressure, cavity pressues and cavity length were measured for attack angles from 8 to 21 deg and a variety of ambient pressure settings. For the small and medium foils, it was sufficient to correct only for the effect on downwash of the images of the trailing vortices. The large foil data, however, required further correction; the corrected force and moment data for the large foil plotted slightly lower than did the data for the two smaller foils, while the cavity length data for the large foil indicated cavity lengths significantly larger than theoretical predictions or the cavity length data for two smaller foils. Existing two-dimensional corrections may be used to bring the force data for the large foil into close agreement with the force data for the two smaller foils, but no correction factors exist of the cavity length data.

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  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Maixner, M R
    • Leehey, P
  • Publication Date: 1980-6

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Filing Info

  • Accession Number: 00314756
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 27 1980 12:00AM