Experimental and numerical study of a finlet-like biomimetic structure-integrated propeller

Scientific Reports

卷:16

Article

Ruiqi Zhang^1,2  Zhengguo Su^1,2  Yuliang Wei¹  Junkui Zhong^1,3  Huaibei Xie⁴  Deyi Kong¹ 

[1] Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, China

[2] University of Science and Technology of China, 230026, Hefei, China

[3] Anhui University of Science and Technology, 232001, Huainan, China

[4] Anhui Finance&Trade Vocational College, 233030, Hefei, China

关键词: Aeroacoustic;    Biomimetic design;    Computational fluid dynamics (CFD);    Computational aeroacoustics (CAA);    Turbulent kinetic energy (TKE);    Unmanned aerial vehicles (UAVs);   

DOI  :  10.1038/s41598-026-58468-0

 received in 2026-03-23, accepted in 2026-06-15,  发布年份 2026

来源: Springer

【 摘 要 】

The aerodynamic noise generated by propellers remains a major challenge for unmanned aerial vehicle (UAV) propulsion systems, simultaneously constraining their stealth capability and energy utilization efficiency. Although propellers incorporating biomimetic designs, such as leading-edge (LE) or trailing-edge (TE) serrations, have demonstrated certain potential for noise mitigation, these approaches are often accompanied by reductions in aerodynamic efficiency or compromised power-consumption performance. To address this issue, this study proposes a finlet-like biomimetic structure-integrated propeller (FLBP), which integrates the flow-conditioning capability of a finlet-like biomimetic structure (FLBS) inspired by fast-swimming fish. Experimental results show that, compared with the baseline propeller (BP), the FLBP exhibits superior overall performance, achieving a maximum noise reduction of 3.69 dB while simultaneously reducing power consumption by up to 6.89%. Spectral analysis further reveals that the FLBS effectively suppresses the discrete tonal noise at the blade passing frequency (BPF) and attenuates broadband noise above 2 kHz. The observed performance enhancement is attributed to the synergistic flow-field regulation induced by the FLBS, including vortex generation, modulation of turbulence development, and enhanced vortex breakdown and dissipation. These findings provide useful insights for the biomimetic optimization design of low-noise, high-efficiency UAV propellers.

【 授权许可】

CC BY-NC-ND   
© The Author(s) 2026

【 图 表 】

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Figure 4. Validation of the spreadsheet-based workflow.

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