Simulation on model performance of ship's diesel engine propulsion in calm water

Ship performance is prevalently evaluated during calm water condition though contrarily the ships operated in actual rough sea environments. The paper elaborates a mathematical model of marine diesel engine propulsion system to estimate real performance of ships in calm water through the proposed computer-simulated model. A post Panamax container ship and LNG tanker are employed as target ships of this study. The analysis of the model includes propeller rotating speed and torque from which the required engine power is estimated to achieve the target speed. These input and output are real-time control system of propeller rotating speed reflecting the characteristics of marine diesel engine. The result has established ultimate limit of affecting features of a real-time control system to control ship speed, power and propeller torque. Further use of the model is advantageous to analyse different condition of ship speed for finding better design characteristics.