The combination of a slow-speed two-stroke diesel engine and a fixed pitch propeller is the most favourable propulsion system for large seagoing vessels, since both components feature outstanding simplicity and efficiency. However, they are disadvantageous where manoeuvrability is concerned. The crash-stop performance of such vessels is characterised by relatively long stopping distances. As this affects ship safety, a research project identified the engine as the origin of the problem, so a methodology has been developed for simulating engine behaviour during the manoeuvre, incorporating simplified models for the reproduction of the relevant boundary conditions, such as a propeller model as the connection between the engine and the vessel. A variation of the engine parameters having a possible influence on the manoeuvre has shown not to be of sufficient impact or not even technically feasible. Consequently, a novel method of applying a braking torque to the propeller by means of water injection into the cylinders during unfired operation is proposed.


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    Title :

    Optimisation of the crash-stop manoeuvre of vessels employing slow-speed two-stroke engines and fixed pitch propellers


    Contributors:

    Published in:

    Publication date :

    2012-01-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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