| As a consequence of energy shortage and environmental protection, the research process of wind energy utilization on large ocean-going vessels is in going on at a greatly accelerated pace. In this thesis, the fundamental study for application on wing-assisted vessel has been studied. By using method of simulation and wind tunnel, the driving force of wind and resistance of ship, as well as the dynamics and kinematics of marine main engine and the technical countermeasure of application have been studied.Firstly, based on the theoretical calculation, the resistance of project ship with different wind and ship speed has been analyzed; The influence of yawing to the resistance of project ship, which is equipped with wing-sail assisted system, has been analyzed utilizing the ship model experiment, the resistance gain induced by the steering angle has been calculated. By using the CFD simulation software and wind tunnel experiment, the wing-sail assisted driving force with different wind speed has been calculated, and the energy efficiency has been analyzed. The result shows that the wing-sail assisted device is most suitably used at a wind angle of100°, the maximum wing-sail assisted driving force can be achieved at a wind angle neither too large nor too small; More than10%of fuel reduction could be achieved.Secondly, load pattern of main moving parts of Wing-Diesel-Ship main engine has been studied from a visual angle of dynamics. The ADAMS virtual prototype of project ship engine MAN B&W5S60MC has been established using the software Pro/Engineer and the load pattern of main moving component at variable load, speed and load-speed conditions due to the changes of wing-sail assisted driving force have been calculated by this virtual prototype. The result shows that when using the wing-sail assisted system, the variation of the wing-sail assisted driving force will lead to the variation of the working condition of the main engine, the load pattern of the crankshaft will become more complex (especially the5#main journal); The influence of the main engine load to the load pattern of main moving parts is tiny, but the influence of the main engine revolution speed is large. When using wing-sail assisted system, the impact on main moving parts is smallest at variable load control mode. The variation of main engine speed should be kept stable in order to avoid load fluctuation of main moving parts caused by excessive changing rate of main engine speed when using variable speed control mode.Thirdly, the propulsion system characteristic of76,000DWT Wing-Diesel-Ship has been studied from visual angle of kinematics. Simulation computation of WDS main propulsion system has been carried out using software Matlab/Simulink, the influence of various wing-sail assisted driving force disturbance to main engine power, torque, and speed output characteristics has been analyzed. According to established ship-engine-propeller-wing mathematical model, the propulsion system model on constant engine speed, constant fuel pump index and constant ship speed sail mode have been established respectively. The ship-engine-propeller-wing model on different sail mode, by utilizing interference wave of different shapes to simulate complex wind thrust, has been simulated. The influence of various wing-sail assisted driving force disturbance waveform to main engine characteristic parameters like rotation speed, cycle fuel consumption, torque, power, navigational speed and resistance has been analyzed according to the simulation result.Finally, the selection principle "feasible, safe, energy-saving" of ship which applies to Wing-Diesel-Ship has been discussed. Several restricted factors of Wing-Diesel-Ship have been analyzed. The related measures which improve the ship propulsion system performance and a new strategy of Wing-Diesel-Ship speed regulating control have been put forward. |
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