EVALUATION OF ICE DEFLECTORS ON THE USCG ICEBREAKER POLAR STAR

Model tests were carried out in the CRREL Ice Engineering Facility test basin on a 1-to-19.1 model of the USCG Polar Star (WAGB-10) to determine the effectiveness of several different devices that would eliminate or mitigate the ingestion of ice into the propeller slip stream. Propeller RPM records and high-speed movies were obtained for each device in two thicknesses of ice and at two speeds. Four devices were evaluated: large bilge keels, small bilge keels, bossing fins and propeller cages (called bird cages). The most effective concept appeared to be the bilge keels. Open water power tests and structural analysis must now be carried out to determine the overall feasibility of these concepts. (Author)

• Corporate Authors:

  U.S. Army Cold Regions Research and Engineering Laboratory

  72 Lyme Road
  Hanover, NH  United States  03755-1290
• Authors:
  • Vance, G P
• Publication Date: 1980-1

Media Info

• Pagination: 42 p.

Subject/Index Terms

• TRT Terms: Aircraft fins; Bilges; Deflectors; Ice; Icebreakers; Model basins; Propellers; Protection; Thickness
• Uncontrolled Terms: Model tests
• Old TRIS Terms: Bilge keels; Fins; Ice deflectors; Ice thickness; Marine propellers; Model testing; Propeller ice interaction
• Subject Areas: Marine Transportation; Security and Emergencies;

Filing Info

• Accession Number: 00317627
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: CRREL-SR-80-4 Spec. Rpt
• Contract Numbers: MIPRZ70099-9-917699B
• Files: TRIS
• Created Date: Jul 22 1980 12:00AM