Evaluation of Ice Deflectors on the USCG Icebreaker POLAR STAR.

Abstract

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)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA082205

Entities

People

  • George P. Vance

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Bilge Keels
  • Bilges
  • Cameras
  • Coast Guard
  • Cold Regions
  • Controllable Pitch Propellers
  • Deflectors
  • Doppler Radar
  • Engineering
  • Extreme Environments
  • Glaciers
  • Model Tests
  • Open Water
  • Propellers
  • Radar
  • Recording Systems
  • Test And Evaluation

Readers

  • Marine Hydrodynamics
  • Maritime Security/Maritime Homeland Security
  • Polar and Arctic Studies