Marine propulsion device based on bypass passive thrust vectoring nozzle and propulsion method thereof

The application discloses a marine propulsion device based on a bypass passive thrust vectoring nozzle and a propulsion method thereof. The propulsion device includes a pod front power device. A liquid flow outlet of the pod front power device is communicated with a bypass passive thrust vectoring nozzle. The bypass passive thrust vectoring nozzle is equipped with a pod connecting end on the outerwall. The water flows through power components of the hull and then flows through a transition section into the bypass passive thrust vectoring nozzle, when the bypass passive thrust vectoring nozzleworks, the water will be deflected to further subject the hull to a left or right control force, then a corresponding control torque is produced, and the traveling direction of the hull is changed. In the invention, the performance characteristics that the bypass passive thrust vectoring nozzle can take water as a working medium are used, the bypass passive thrust vectoring nozzle is mounted at the rear portion of the tra