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Overall Design Technology of Unmanned Underwater Systems | Publishing Language: Chinese

Study on noise reduction of pump-jet propulsors based on porous media stator leading edges

Jianguo ZHENG( ), Hao WEN, Yijun MAO
School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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Abstract

Objective

To suppress hydrodynamic noise at the source, a noise reduction method for pump-jet propulsors based on porous media is proposed.

Methods

By replacing the metallic leading edges of the stator blades of the pump-jet propulsor with porous materials, the interaction between the blade wake and the inner wall of the duct can be effectively modulated, thereby reducing wall pressure fluctuations. Large eddy simulation (LES), combined with acoustic analogy analysis, was employed to investigate the flow characteristics and noise control performance of the stator blades with porous leading edges. The mechanisms by which the porous media modulates the flow field and suppresses noise were analyzed, and the effects of key parameters, such as porosity and advance coefficient, on hydrodynamic noise control were examined.

Results

Comparative results indicate that the porous leading edges of the stator significantly reduce the low-frequency sound pressure level components on the duct wall and the far-field radiation noise. The maximum reduction in the sound pressure level (SPL) reaches 5.52 dB in the direction perpendicular to the rotation axis of the pump-jet propulsor.

Conclusion

The findings of this study provide useful guidance for flow control and hydrodynamic noise reduction in pump-jet propulsors.

Keywords

pump-jet propulsorrotating machinerystator blade leading edgeporous mediaflow controlnoise abatementnoise reduction
CLC number: U661.1 Document code: A

References

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Chinese Journal of Ship Research
Volume 21 Issue 2,
April 2026
Pages 240-255
DOI: 10.19693/j.issn.1673-3185.04602

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Cite this article:
ZHENG J, WEN H, MAO Y. Study on noise reduction of pump-jet propulsors based on porous media stator leading edges. Chinese Journal of Ship Research, 2026, 21(2): 240-255. https://doi.org/10.19693/j.issn.1673-3185.04602

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Received: 08 July 2025
Revised: 13 September 2025
Published: 26 March 2026
© 2026 Chinese Journal of Ship Research.