AIR INJECTION TO AVOID CAVITATION EROSION IN PROPELLER DUCTS

A series of model tests have been carried out to study the effects of injecting air at the top of propeller ducts. By paint erosion tests and by the newly developed aluminum roughness testing technique it is shown that this air injection principle is very efficient in reducing cavitation erosion in the duct. The tests also show that as long as the rate of air supply is not increased far beyond that necessary for avoiding erosion, there is hardly any significant effect on vibratory forces or propulsive efficiency. A scaling law for converting the rate of air supply from model to full scale is developed.

  • Corporate Authors:

    Royal Norwegian Council for Scientific & Indus Res

    Radhusgaten 8, Sentrum
    Oslo,   Norway 
  • Authors:
    • Huse, E
  • Publication Date: 1976

Media Info

  • Features: References;
  • Pagination: p. 21-40
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00134627
  • Record Type: Publication
  • Source Agency: Royal Norwegian Council for Scientific & Indus Res
  • Files: TRIS
  • Created Date: Jun 9 1976 12:00AM