Tunnel bow thrusters are often used by large ships to provide low- speed lateral maneuverability when docking. Required to provide high thrust while essentially at a standstill, the design point for these thrusters is the bollard pull condition. Traditionally, the term bollard pull refers to the amount of force a tug can apply to a bollard when secured to a pier. Here, the bollard pull condition is used to describe a propeller with no flow over it except for that induced by its own rotation. Conventional propeller design is primarily performed for an optimal vessel speed or range of speeds. OpenProp, a propeller design code based on lifting line theory, is a numerical model capable of design and analysis of such propellers. It has been experimentally validated for standard design conditions in an external flow, but until now has been incapable of design with no external fluid velocity component applied. Recent updates to the model now allow for bollard pull design work. This project is the first application of the OpenProp model update. Propellers are designed for both open water and ducted (tunnel) applications in OpenProp.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Propeller Design Optimization for Tunnel Bow Thrusters in the Bollard Pull Condition


    Contributors:

    Publication date :

    2012


    Size :

    98 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Paper 5 Bollard Pull

    Skogman, A. / Jukola, H. / ABR Company Limited | British Library Conference Proceedings | 2002



    Optimization for improved propulsive efficiency and increased bollard pull

    Huuva, Tobias / Pettersson, Magnus | Tema Archive | 2011