RECENT RESULTS ON TIP VORTEX CAVITATION SCALE EFFECTS AT HIGH REYNOLDS NUMBERS

In order to verify the Reynolds extrapolation law on tip vortex cavitation (TVC), basic experiments were conducted on two 3.8 area ratio elliptical hydrofoils with a NACA0020 and a NACA16020 cross sections for Reynolds numbers reaching 8.2x106. Critical cavitation numbers, axial and tangential velocity profiles of the tip vortex were measured. The NACA0020 foil displays much larger desinent cavitation numbers as well as larger tangential and axial velocities compared to the NACA16020. This is due to the increase of the lift coefficient, caused by the change of the cross section. The influence of the Reynolds number on TVC and its dependence with the angle of attack of the foil are determined. It is shown that the desinent cavitation number scales with the Reynolds to the power 0.4 and the square of the lift coefficient.

  • Supplemental Notes:
    • NEVA 93, Design and Operation of Ships and Offshore Structures Seminar; 14-18 Sept 1993; St Petersburg, CIS. Pprs. Pubs by Computational Mechanics Publications Ltd, Southampton, UK, ISBN 1-85312-248-3. Section 2, p 145 [8 p, 8 ref, 5 fig]
  • Authors:
    • Pauchet, A
    • Briancon-Marjollet, L
  • Publication Date: 1993

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00716127
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Feb 28 1996 12:00AM