One of the activities during the design of a ship propulsion system is the matching of the ship, propeller, gearbox and driving machine. The theory behind this matching process is well defined and documented. An important choice in the process is the range of operating conditions for which the system is to be designed. Good practise is to design with some margin for seastate, fouling and displacement growth. This margin is traditionally taken into account for by the empirical factor called Service Margin.
Besides the operational factors that are included in the Service Margin, there are many design uncertainties involved in the matching process that are normally not taken into account. This paper shows that these uncertainties can result in a significant uncertainty of the operating points of the propulsion plant, which can easily lead to overloading of the driving machine or to early onset of cavitation. As a possible mitigation of this uncertainty, the benefits of an adjustable bolted propeller (ABP) are analysed. As will be shown, an ABP can be used to compensate for uncertainty during the design process, as well as for increase of ship resistance during the ship’s life.
Adjustable bolted propellers: mitigating uncertainty
Journal of Marine Engineering & Technology ; 11 , 2 ; 3-14
2012-04-01
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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