Axial flow pumps possess a unique structure where there must be clearances between the
impeller and the piping wall, usually not exceeding 0.1% of the impeller diameter. Despite …

Ship anti-rolling devices are an essential component of modern vessels. The core
component of the Magnus effect-based ship anti-rolling device is a rotating cylinder …

The control of the excitation force of pump-jets is of great significance for the stealth
performance of submarines. In a previous study, the authors found that the sinusoidal …

This study introduces a concept that jet technology in the aeronautical field is used for active
flow control to improve the hydrodynamic performance of a ducted propeller. Jet flow is …

Rim-driven thrusters (RDT) are of great interest for the development of integrated electric
motors for underwater vehicles. Gap flow is one of the most prominent flow characteristics …

As an underwater thruster, the pump-jet propulsor (PJP) exhibits low radiation noise but
generates significant line spectral noise in the low-frequency band. In this paper, we …

In the process of movement, the submarine inevitably involves free surface navigation, such
as floating observation, suction power generation, and rescue. Under various …

Inspired by the silent gliding feather of owl wings, the trailing edge of the duct of a pump-jet
propulsor was designed with a similar serrated structure in order to reduce noise generation …

Due to mutual interference between various components, the transitional motion of fluid
particles in the flow field of pump jet propulsion becomes more complex and variable …

In this study, micro jets were applied to actively controlling the flow of the international
standard ducted propeller model. The detached-eddy simulation (DES) method with the …