The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein
Dragonfly wings have many excellent functions, such as superhydrophobic, fatigue resistance, anti-reflection, etc. However, there are few reports on the low noise flight of dragonfly wings. For this reason, the microgeometry of dragonfly wings was studied in this paper to reveal the mechanism of low...
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MDPI AG
2021-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/7/2970 |
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| author | Shan Jiang Yong Hu Qiang Li Hongde Wang Yang Lin Xiaoqin Zhou Qiang Liu |
| author_facet | Shan Jiang Yong Hu Qiang Li Hongde Wang Yang Lin Xiaoqin Zhou Qiang Liu |
| author_sort | Shan Jiang |
| collection | DOAJ |
| description | Dragonfly wings have many excellent functions, such as superhydrophobic, fatigue resistance, anti-reflection, etc. However, there are few reports on the low noise flight of dragonfly wings. For this reason, the microgeometry of dragonfly wings was studied in this paper to reveal the mechanism of low-noise flight of dragonfly leading veins. The micromorphology of dragonfly wings was observed by scanning electron microscopy. It was found that the leading-edge veins of dragonfly wings have a triangular prism-like serrated structure, which has been proven to have the effect of improving aeroacoustics. According to the principle of scale law of flying organisms, a bionic model with the leading-edge microstructure of dragonfly’s front wing was established, and computational fluid dynamics (CFD) analysis of serration bionic microstructure was carried out. The effects of geometric parameters, such as height, width and overall amplification factor of microstructure on aeroacoustics were obtained. The distribution of pressure fluctuation on the surface of the bionic wing was also analyzed in this paper. It was found that the serrated microstructure can significantly suppress the noise generation in the mid-frequency band. Finally, wind tunnel tests were simulated using a designed low-noise rotating test platform. The test results confirmed that the serration microstructure has certain noise-reduction characteristics. |
| first_indexed | 2024-03-10T12:53:31Z |
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| id | doaj.art-b2c25b2154e84a9687a93f5edfeb6ebd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:53:31Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-b2c25b2154e84a9687a93f5edfeb6ebd2023-11-21T12:08:39ZengMDPI AGApplied Sciences2076-34172021-03-01117297010.3390/app11072970The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading VeinShan Jiang0Yong Hu1Qiang Li2Hongde Wang3Yang Lin4Xiaoqin Zhou5Qiang Liu6Key Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaKey Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaKey Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaFAW Car Co., Ltd., Changchun 130012, ChinaKey Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaKey Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaKey Laboratory of CNC Equipment Reliability, Ministry of Education, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, ChinaDragonfly wings have many excellent functions, such as superhydrophobic, fatigue resistance, anti-reflection, etc. However, there are few reports on the low noise flight of dragonfly wings. For this reason, the microgeometry of dragonfly wings was studied in this paper to reveal the mechanism of low-noise flight of dragonfly leading veins. The micromorphology of dragonfly wings was observed by scanning electron microscopy. It was found that the leading-edge veins of dragonfly wings have a triangular prism-like serrated structure, which has been proven to have the effect of improving aeroacoustics. According to the principle of scale law of flying organisms, a bionic model with the leading-edge microstructure of dragonfly’s front wing was established, and computational fluid dynamics (CFD) analysis of serration bionic microstructure was carried out. The effects of geometric parameters, such as height, width and overall amplification factor of microstructure on aeroacoustics were obtained. The distribution of pressure fluctuation on the surface of the bionic wing was also analyzed in this paper. It was found that the serrated microstructure can significantly suppress the noise generation in the mid-frequency band. Finally, wind tunnel tests were simulated using a designed low-noise rotating test platform. The test results confirmed that the serration microstructure has certain noise-reduction characteristics.https://www.mdpi.com/2076-3417/11/7/2970noise reductionmicrostructuredragonfly wingleading edge |
| spellingShingle | Shan Jiang Yong Hu Qiang Li Hongde Wang Yang Lin Xiaoqin Zhou Qiang Liu The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein Applied Sciences noise reduction microstructure dragonfly wing leading edge |
| title | The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein |
| title_full | The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein |
| title_fullStr | The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein |
| title_full_unstemmed | The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein |
| title_short | The Noise-Reduction Characteristics of Microstructure of Dragonfly Wing Leading Vein |
| title_sort | noise reduction characteristics of microstructure of dragonfly wing leading vein |
| topic | noise reduction microstructure dragonfly wing leading edge |
| url | https://www.mdpi.com/2076-3417/11/7/2970 |
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