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.
- 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.
Society of Naval Architects and Marine Engineers601 Pavonia Avenue
Jersey City, NJ USA 07306-2907
- Kerwin, J E
- Lewis, S D
- Kobayashi, S
- Publication Date: 1978
- Features: References;
- Pagination: 18 p.
- TRT Terms: Cavitation (Mechanics); Cavitation erosion; Force; Hulls; Measurement; Propellers; Vibration
- Old TRIS Terms: Cavitating propellers; Hull forces; Hull vibration; Propeller induced vibration; Rake; Skewed propellers; Vibration measurement
- Subject Areas: Marine Transportation; Vehicles and Equipment;
- 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