Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

Model identification and dynamic analysis of ship propulsion shaft lines

Dynamic response analysis of mechanical structures is usually performed by adopting numerical/analytical models. Finite element (FE) modeling as a numerical approach plays an important role in dynamic response analysis of complex structures. The calculated dynamic responses from FE analysis are only reliable if accurate FE models are used. There are many elements in real mechanical structures w...

Bubble Augmented Waterjet Propulsion: Numerical and Experimental Studies

In this paper, we present our efforts to test experimentally and numerically the concept of bubble augmented jet propulsion. The numerical model is based on a two-way coupling between an Eulerian description of the flow field and a Lagrangian tracking of bubbles using the Surface Averaged Pressure (SAP) model. The numerical results compares favorably with nozzle experiments. A half 3-D nozzle f...

Modeling of Ship Propulsion Performance

Full scale measurements of the propulsion power, ship speed, wind speed and direction, sea and air temperature, from four different loading conditions has been used to train a neural network for prediction of propulsion power. The network was able to predict the propulsion power with accuracy between 0.8-2.8%, which is about the same accuracy as for the measurements. The methods developed are i...

Exploring alternative methods of ship propulsion

Simulation of a Ship Propulsion System with Dtc Driving Scheme

In this paper an effort is made to represent the behaviour of a ship propulsion system comprising a Permanent Magnet Synchronous Motor (PMSM) driven by a 6-pulse driving system using the Direct Torque Control (DTC) control technique. The DTC technique cited is emulated via MATLAB's Simulink toolbox while all study cases are performed successfully in MATLAB's Power System Blockset environment.