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Study on noise reduction of pump-jet propulsors based on porous media stator leading edges
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Jianguo ZHENG*, Hao WEN, Yijun MAO
Chinese Journal of Ship Research | 2026, 21(2) : 240 - 255
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Chinese Journal of Ship Research | 2026, 21(2): 240-255
• Overall Design Technology of Unmanned Underwater Systems •
Study on noise reduction of pump-jet propulsors based on porous media stator leading edges
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Jianguo ZHENG*, Hao WEN, Yijun MAO
Affiliations
  • School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Published: 2026-04-30 doi: 10.19693/j.issn.1673-3185.04602
Outline
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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.

pump-jet propulsor  /  rotating machinery  /  stator blade leading edge  /  porous media  /  flow control  /  noise abatement  /  noise reduction
Jianguo ZHENG, Hao WEN, Yijun MAO. Study on noise reduction of pump-jet propulsors based on porous media stator leading edges[J]. Chinese Journal of Ship Research, 2026 , 21 (2) : 240 -255 . DOI: 10.19693/j.issn.1673-3185.04602
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Year 2026 volume 21 Issue 2
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Article Info
doi: 10.19693/j.issn.1673-3185.04602
  • Receive Date：2025-07-08
  • Online Date：2026-05-20
  • Published：2026-04-30
Article Data
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History
  • Received：2025-07-08
  • Revised：2025-09-13
Affiliations
    School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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