Trawler Icing: A Compilation of Work Done at N.R.C. (Givrage des Chalutiers: Compilation des Recherches Effectuees au C.N.R.).

This report collates and reviews the results of an eleven-year project on the icing of fishing trawlers. Initially the factors causing the icing of ships at sea are presented and some aspects of the physics of the icing process are discussed. Some simple icing tests on cylinders of various diameters...

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Bibliographic Details
Main Author: Stallabrass,J R
Other Authors: NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF MECHANICAL ENGINEERING
Format: Text
Language:English
Published: 1980
Subjects:
Meteorology
Marine Engineering
*SHIPS
*ICE FORMATION
*MARINE METEOROLOGY
MATHEMATICAL MODELS
HAZARDS
CANADA
ATMOSPHERIC TEMPERATURE
RUBBER
TEST EQUIPMENT
METEOROLOGICAL DATA
WEATHER FORECASTING
MARINE ATMOSPHERES
CYLINDRICAL BODIES
DROPS
RECTANGULAR BODIES
WIND TUNNEL TESTS
ACCUMULATION
INFLATABLE STRUCTURES
NORTH ATLANTIC OCEAN
OUTDOOR
DEICING SYSTEMS
Fishing vessels
Trawlers
Canada
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA100832
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA100832
Description
Summary:This report collates and reviews the results of an eleven-year project on the icing of fishing trawlers. Initially the factors causing the icing of ships at sea are presented and some aspects of the physics of the icing process are discussed. Some simple icing tests on cylinders of various diameters are described. These were made in an icing wind tunnel and demonstrated the effects of air temperature and cylinder size of the resulting ice formations. Later, a number of possible methods for reducing the icing hazard were tested in the wind tunnel and at an outdoor test rig. Of the methods tested the most effective was an inflatable rubber de-icing blanket. Throughout the project, icing report forms were distributed to vessels operating out of Canadian east coast ports. The data obtained by this means has helped to establish the types of weather systems responsible for icing conditions, the geographical extent of the occurrence of icing, and statistics on the severity of icing encounters in the study area. Appendices present simplified formulae for the droplet collection efficiency of cylinders and rectangular bodies, the derivation of an analytical expression for the rate of ice build-up on fishing trawlers, and a bibliography of ship icing. (Author) Summary in French.

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