engleski

Determination of Hydrodynamic Characteristics of Ducted Propeller Using an Artificial Neural Network

Dynamically positioned marine vessels are mostly equipped with azimuth thrusters with ducted propellers. The main reason for this is the possibility of azimuth thrusters to produce the demanded thrust in any horizontal direction, while the ducted propeller significantly increases the efficiency of heavily loaded screw propellers due to the negligible or very small propeller advance speeds. The test results of a systematic series developed at the institute MARIN are commonly used for the ducted propellers. An artificial neural network was trained using the regression polynomials of the propellers Ka 4-70 and Ka 4-55 in combination with the accelerating nozzle 19A which gives the possibility to determine the hydrodynamic characteristics of ducted propeller in open water conditions. The obtained results confirm the exceptional capabilities of neural networks, and the developed neural network provides the possibility of further applications for more accurate modeling of thruster in an otherwise very complex hydrodynamic model of propulsion of the dynamically positioned marine vessel.

ducted propeller; artificial neural network; dynamic positioning of a marine vessel

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