Research on the influence of biomimetic serrated structure on the hydrodynamic noise characteristics of toroidal propeller

MAO Xinpei; LIU Peng; LIU Jiang; KANG Ludi; JIN Hui; YIN Yibing

doi:10.11993/j.issn.2096-3920.2025-0141

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MAO Xinpei, LIU Peng, LIU Jiang, KANG Ludi, JIN Hui, YIN Yibing. Research on the influence of biomimetic serrated structure on the hydrodynamic noise characteristics of toroidal propeller[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0141

Citation:

MAO Xinpei, LIU Peng, LIU Jiang, KANG Ludi, JIN Hui, YIN Yibing. Research on the influence of biomimetic serrated structure on the hydrodynamic noise characteristics of toroidal propeller[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0141

Citation:

MAO Xinpei, LIU Peng, LIU Jiang, KANG Ludi, JIN Hui, YIN Yibing. Research on the influence of biomimetic serrated structure on the hydrodynamic noise characteristics of toroidal propeller[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0141

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Research on the influence of biomimetic serrated structure on the hydrodynamic noise characteristics of toroidal propeller

doi: 10.11993/j.issn.2096-3920.2025-0141

School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China

Received Date: 2025-10-13
Accepted Date: 2025-11-06
Rev Recd Date: 2025-11-04

Available Online: 2026-03-26

Abstract

Abstract

The toroidal propeller has emerged as a research hotspot owing to its potential for enhancing propulsion efficiency and achieving effective noise control. Biomimetic principles offer a novel technical approach to noise reduction. However, the application research of biomimetic modification in the field of underwater propellers is still relatively scarce. Therefore, this study aims to explore the mechanism of the influence of biomimetic serrated structures on the hydrodynamic noise of toroidal propellers. Inspired by the acoustic characteristics of owl wing-edge serrations and based on the parametric modeling method of toroidal propeller, a biomimetic variant with trailing-edge serration features was designed. Based on computational fluid dynamics(CFD) and the FW-H acoustic analogy theory, the characteristics of the propeller flow field and the variation patterns of non-cavitation noise under different serration sizes were systematically analyzed. The research results show that the biomimetic structure has a modulation effect on the broadband noise components of the propeller, achieving a noise reduction of 0.3 to 1.5 dB within the radial observation plane; in the area of the blade tip and the rear part of the middle section, the noise reduction effect is significantly dependent on the serration size and the operating speed. That is, at high rotational speeds, the noise amplitude is effectively reduced, while at low rotational speeds, the noise in specific areas slightly increases. This study elucidated the influence of bionic serrated parameters on noise, providing a theoretical foundation and optimization direction for the bionic design of low-noise underwater propellers.
- toroidal propeller,
- biomimetic modification,
- serrated trailing edges,
- hydrodynamic noise,
- FW-H acoustic analogy

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References(23)

References

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