Abstract
ABSTRACTThe paper describes a computational approach to predict required added power for propulsion in waves. Such predictions are important to address fuel consumption in seaway and define suitable operating point and sea margin, as well as for routing optimisation and hull performance monitoring. Added resistance and in general time-average wave-induced forces and moments are key input parameters for added power requirements. A 3d Rankine source-patch method was used to compute them. The method solves the problem in the frequency domain, linearising wave-induced motions around the fully nonlinear steady flow. The numerical method combines calculation of calm-water manoeuvring forces and moments and added resistance due to waves, wind and rudder with propulsion model to predict added power in seaway. The approach is demonstrated for a container ship to compare predictions with full-scale data.
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