Jet pump propulsion system

Document Type : Promotion Article

Authors

1 University Instructor (Shahid Mofteh)

2 Assistant Professor, Department of Mechanical Engineering, Malik Ashtar University of Technology, Isfahan

3 Ph.D. student of mechanical engineering - energy conversion, University of Technology Malik Ashtar, Isfahan

4 senior expert in aerospace engineering, Malik Ashtar University of Technology, Tehran

Abstract

The jet pump thrust system is one of the types of marine propulsion systems that creates the thrust force based on the momentum difference method. The jet pump is primarily designed for underwater vehicles. The jet pump propulsion system has been widely used due to its stealth and excellent performance, but due to its secrecy and complexity, few details have been published. The behavior of this propulsion system is similar to axial flow pumps. The main components of jet pump thrust system include duct, motor, stator, hub and boss. The motor is installed on the hub with a specific number of blades and the stator is attached to the hub from the root side and to the inner surface of the duct from the tip side.

Jet pumps are classified into four categories according to the placement of the motor and stator inside the duct as well as the rotation mechanism: pre-rotation, post-rotation, driving ring and double anisotropy. The pre-rotation type has less noise and efficiency than the post-rotation type and is considered a type of ultra-silent propulsion system. Considering the numerous advantages of using nuclear propulsion in submarines and other marine vehicles, the jet pump seems to be a suitable candidate for marine propulsion systems with nuclear propulsion, considering the acoustic advantages as well as the limitations of the phenomenon of xenon poisoning and power reduction in nuclear reactors. arrives. In this research, an attempt is made to introduce this type of engine and examine its advantages.

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Main Subjects

References

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