THEORY FOR THE VIBRATORY FORCES ON A FLAT PLATE ARISING FROM INTERMITTENT PROPELLER BLADE CAVITATION

An analysis was made which shows that the dominant cavity-induced force on a flat bottomed, shallow draft ship is expressible in a very simple form when the cavity volume as a function of blade position is known. The increased loading on conventionally configured propellers has led to the frequent occurrence of intermittent propeller blade cavitation in the region between + or - 60 degree about the 12 o'clock position on tankers as well as on high-speed container ships. Measurements of hull pressures on models in variable pressure facilities, as well as on ships, have shown these cavity-induced pressures to be large not only at blade frequencies, but also at higher harmonics. The effects are particularly large at twice and three times blade frequency.

• Corporate Authors:

  Schroedter (C) and Company

  Stubbenhuk 10
  Hamburg 11,   Germany 
• Authors:
  • Breslin, J P
• Publication Date: 1976-11

Media Info

• Features: References;
• Pagination: p. 160-168
• Serial:
  • Schiffstechnik
  • Volume: 114
  • Issue Number: 23
  • Publisher: Schroedter (C) and Company

Subject/Index Terms

• TRT Terms: Blades (Machinery); Cavitation (Mechanics); Cavitation erosion; Hulls; Propellers; Shallow draft ships; Ships; Vibration
• Old TRIS Terms: Blade frequency vibration; Hull propeller interaction
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00156292
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jun 22 1977 12:00AM