Analysis of power consumption and propeller shaft speed
Analysis and prediction of power consumption and propeller shaft speed based on bare hull resistance, empirically determined propulsive coefficients (WT, t, hR) and open water characteristics from the large database of model tested propellers/thrusters at Kongsberg Hydrodynamic Research Centre.
Analysis and prediction of power consumption can alternatively by predicted using self-propulsion simulations for prediction of delivered power to the propeller (PD) and propeller shaft speed (n).
In these CFD simulations the hull is free to move in trim and sinkage and the method calculates the free surface and wave resistance using 2-phase (water and air) flow, transient RANS and SST-kΩ turbulence model.
Simulations can be done in both model- and full-scale to enable validation against model tests and prediction of sea trials performance.
The method are continuously improved for better accuracy to build confidence in predicted levels.