Influence of propulsion shafting longitudinal vibration on the excitation force and vortex dynamics characteristics of pump-jet propulsor

Zou, Donglin; Xue, Lin; Lin, Qiang; Xu, Jianghai; Dong, Xinguo; Ta, Na; Rao, Zhushi

doi:10.1016/j.oceaneng.2024.116962

Ocean Engineering

2024

DOI: 10.1016/j.oceaneng.2024.116962

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Influence of propulsion shafting longitudinal vibration on the excitation force and vortex dynamics characteristics of pump-jet propulsor

Donglin Zou,

Lin Xue,

Qiang Lin

et al.

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2024

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Cited by 3 publications

References 51 publications

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A multimodal dynamic vibration absorber for controlling longitudinal vibration of propulsion shafting system

Ren,

Liu,

Dong

et al. 2024

Applied Ocean Research

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A multimodal dynamic vibration absorber for controlling longitudinal vibration of propulsion shafting system

Ren,

Liu,

Dong

et al. 2024

Applied Ocean Research

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An active-passive integrated actuator based on macro fiber composite for on-orbit micro-vibration isolation

Lu,

Qi,

Yan

et al. 2024

Aerospace Science and Technology

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Research on the excitation force and vortex dynamics characteristics of pump-jet propulsor induced by shafting whirling vibration: Non-uniform blade tip clearance

Zou,

Xue,

Yang

et al. 2024

Physics of Fluids

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The propulsion shafting whirling vibration causes non-uniform dynamic changes in the rotor tip clearance, which directly have a significant influence on the excitation force and vortex dynamic characteristics of the pump-jet propulsor. In the current study, based on improved delay detached eddy simulation, the influence of non-uniform blade tip clearance on the excitation force and vortex dynamics characteristics of the pump-jet propulsor is studied under design conditions. The results show that the application of propulsion shafting whirling vibration induces significant changes in the excitation force of the pump-jet propulsor. The rotor blades modulate the excitation forces of the stator blades and duct. The transverse and vertical excitation forces are more significant than the longitudinal excitation force. The magnitude change in the circular orbit shows a linear relationship with the excitation force magnitude. The characteristic frequency of the transverse and vertical excitation forces of each component is the shaft rotation frequency. In contrast, the characteristic frequency of the longitudinal excitation force is twice the shaft rotation frequency. In the elliptical orbit, the excitation force of each component is compressed or stretched in the time domain, and the dominant frequency is shifted in the frequency domain; there is no longer a linear relationship between the vibration magnitude change and the excitation force magnitude. Furthermore, an energy generation mechanism in the wake field of the pump-jet propulsor induces vortex frequency due to the whirling vibration of the propulsion shafting system.

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Influence of propulsion shafting longitudinal vibration on the excitation force and vortex dynamics characteristics of pump-jet propulsor

Cited by 3 publications

References 51 publications

A multimodal dynamic vibration absorber for controlling longitudinal vibration of propulsion shafting system

A multimodal dynamic vibration absorber for controlling longitudinal vibration of propulsion shafting system

An active-passive integrated actuator based on macro fiber composite for on-orbit micro-vibration isolation

Research on the excitation force and vortex dynamics characteristics of pump-jet propulsor induced by shafting whirling vibration: Non-uniform blade tip clearance

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