Sökning: "thrust deduction"

Hittade 3 uppsatser innehållade orden thrust deduction.

  1. 1. Investigation of Effective Wake Scaling for Unconventional Propellers

    H-uppsats, Chalmers tekniska högskola/Institutionen för sjöfart och marin teknik

    Författare :SURYA KIRAN PERAVALI; [2016]
    Nyckelord :Unconventional Kappel propeller; scale effect; ITTC-78 method; wake fraction; OpenFOAM;

    Sammanfattning : At SSPA model tests are evaluated and scaled to full scale using the ITTC 78 performaceprediction method. The ITTC 78 method has been validated against the sea trials overmore than 35 years and is very adapted to the conventional propellers. LÄS MER

  2. 2. A Study of the Twin Fin Concept for Cruise Ship Applications

    Master-uppsats, KTH/Marina system

    Författare :Frida Nyström; [2015]
    Nyckelord :;

    Sammanfattning : The aim with this thesis is to investigate if the Twin Fin concept can be a beneficial propulsion system for large cruise ships, about 300 m long.The Twin Fin concept is a new propulsion system, launched in 2014 by Caterpillar Propulsion [1]. LÄS MER

  3. 3. Systematic variations of parameters affecting waterjet-hull interaction

    H-uppsats, Chalmers tekniska högskola/Institutionen för sjöfart och marin teknik

    Författare :Johan Andersen; Gustav Moe; [2014]
    Nyckelord :waterjet; STARCCM ; STREAMLINE; 2DOF; finite volume method; waterjet-hull interaction; net thrust; thrust deduction; hull efficiency;

    Sammanfattning : The purpose of this thesis is to follow a methodology in which computational models with two degrees of freedom (2DOF), based on the finite volume method, are validated and used to investigate how certain phenomena and parameters, especially the longitudinal position of the waterjet intake, affect resistance and thrust deduction (t) for the STREAMLINE hull. To arrive at a scientific answer to this question a methodology is carried out comprised of a grid dependence study followed by three studies of systematic variation. LÄS MER