arctic Ice crushing propeller dyn


When a captain of an ice-going vessel stands on the bridge looking at the enchanting world


around him he wants to hear the comforting sound of ice smoothly being crushed by the heavily loaded propeller he is


controlling. Report asks if the industry is ready – can our captain really enjoy his trip in ice cov- ered waters - or is there still work to be done?


O Gerco Hagesteijn g.hagesteijn@marin.nl 14 report


Operations in the Arctic regions are intensifying as a result of more transportation through the north-


ern route and due to increasing offshore, research and recreational activities. All these activities increase the need for more fundamental knowledge about ice loads on propulsors so better guidelines can be provided for the safe operation of ships in Arctic regions. The ice loads associated with operations in ice are fairly well documented for the Baltic Sea but for the new operational areas, such as the Polar regions, there are still many unknown factors.


During the last three years the CRS working group PROPOLAR has been attempting to


gain better insight into the practical opera- tion of ice going vessels and it is investigat- ing the fundamentals of propeller- ice interaction. The aim of the working group was to provide operational guidelines for propulsion systems and to improve the technical design guidance, specifically for azimuthing propulsors but also for propellers in general.


Podded propulsors Ice induced loads have been described in literature and they have been investigated in model and full scale tests but a clear definition and under- standing of the most important physical phenomena are still lacking. The parameters that are most important for the dimensioning


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