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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Adjustable bolted propellers: mitigating uncertainty


    Contributors:
    Vrijdag, A. (author) / Stapersma, D. (author) / Grunditz, G. (author)

    Published in:

    Publication date :

    2012-04-01


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Adjustable pitch propellers

    Kretzschmar, F. | Engineering Index Backfile | 1941


    Adjustable ship propellers

    Schwyzer, R. | Engineering Index Backfile | 1935


    Propellers with adjustable blades

    Nordstrom, H.F. | Engineering Index Backfile | 1947


    Functions and prospects of adjustable airplane propellers

    Roth, F. | Engineering Index Backfile | 1945


    Advisability of ship propellers with adjustable blades, etc

    Vernander, S.K. | Engineering Index Backfile | 1940