Abstract: In designing the propulsion plant of a high-speed vessel it is important to investigate, in addition to the steady behaviour, the dynamic performance of the system over a wide range of operating conditions. This paper presents a mathematical model for the dynamic simulation of a waterjet propulsion system. The model, developed in a Matlab-Simulink software environment, is structured in modular form, in order to describe the various elements of the system as individuals blocks (hull, prime mover, gear, waterjet, etc.), taking into account their interactions. In this way it is possible to characterise the dynamic behaviour of both the single components and of the whole propulsion plant. The present work represents an extension to the high-speed vessels of a simulation model already developed and published by some of the authors for the performance prediction of marine propulsion plants. In its earlier version the model was provided with a block representing a controllable pitch propeller. In the present version this block has been substituted by a waterjet block, whose inclusion has required, however, some further modifications of the simulation scheme. A first validation of the model has been obtained by comparing the results given by the simulation with the experimental data surveyed on board of a built vessel, showing a good agreement between them.
A Dynamic Model for the Performance Prediction of a Waterjet Propulsion System
BENVENUTO, GIOVANNI BATTISTA;CAMPORA, UGO;FIGARI, MASSIMO;
1998-01-01
Abstract
Abstract: In designing the propulsion plant of a high-speed vessel it is important to investigate, in addition to the steady behaviour, the dynamic performance of the system over a wide range of operating conditions. This paper presents a mathematical model for the dynamic simulation of a waterjet propulsion system. The model, developed in a Matlab-Simulink software environment, is structured in modular form, in order to describe the various elements of the system as individuals blocks (hull, prime mover, gear, waterjet, etc.), taking into account their interactions. In this way it is possible to characterise the dynamic behaviour of both the single components and of the whole propulsion plant. The present work represents an extension to the high-speed vessels of a simulation model already developed and published by some of the authors for the performance prediction of marine propulsion plants. In its earlier version the model was provided with a block representing a controllable pitch propeller. In the present version this block has been substituted by a waterjet block, whose inclusion has required, however, some further modifications of the simulation scheme. A first validation of the model has been obtained by comparing the results given by the simulation with the experimental data surveyed on board of a built vessel, showing a good agreement between them.
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