SYSTEMATIC EXPERIMENTS TO DETERMINE THE INFLUENCE OF SKEW AND RAKE ON HULL VIBRATORY EXCITATION DUE TO TRANSIENT CAVITATION

Results of a systematic series of experiments showing the influence of propeller blade skew with and without rake on hull vibratory excitation are presented. These experiments were carried out in a variable pressure water tunnel using a screen generated wake typical of a high-speed single screw cargo ship. These propellers were operated at design advance coefficient and at four cavitation numbers ranging down to a typical value for full speed for this type of vessel. Measurements were made of the vibratory force on a large disc imbedded in a plate above the propeller. These force measurements are intended to be representative, for comparative purposes, of the local propeller vibratory excitation on an actual ship hull. In addition, an extensive series of photographs was obtained for each condition to illustrate the growth and collapse of wake-induced propeller blade cavities.

  • Supplemental Notes:
    • Presented at the Ship Vibration Symposium sponsored by The Ship Structure Committee and The Society of Naval Architects and Marine Engineers, Arlington, Virginia, October 16-17, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Kerwin, J E
    • Lewis, S D
    • Kobayashi, S
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00183171
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM