Study on flow noise characteristics of Bionic cylinder based on acoustic analogy
The drag and noise reduction of the flow around a cylinder is one of the important topics in hydrodynamics and acoustics. In this paper, three typical bionic cylinders are designed based on the serrated structure on the surface of shark skin. Using Large eddy turbulence model and Lighthill’s acousti...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2021-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2021/05/matecconf_cscns20_01003.pdf |
| _version_ | 1819054093925089280 |
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| author | Cui Zixian Song Hao Li Qi An Buchao Su Lin |
| author_facet | Cui Zixian Song Hao Li Qi An Buchao Su Lin |
| author_sort | Cui Zixian |
| collection | DOAJ |
| description | The drag and noise reduction of the flow around a cylinder is one of the important topics in hydrodynamics and acoustics. In this paper, three typical bionic cylinders are designed based on the serrated structure on the surface of shark skin. Using Large eddy turbulence model and Lighthill’s acoustic analogy method, the flow noise characteristics of smooth cylinder and three kinds of bionic cylinders at different Reynolds numbers were compared, and the structure of cylinder surface was optimized. The results show that the main source of the flow noise around a cylinder is dipole noise, which is caused by the periodic fluctuating pressure on the cylinder surface.The bionic cylinder can reduce the amplitude of the fluctuating pressure, improve the wake flow field and reduce the wake vorticity, so as to reduce the noise. Among the three kinds of bionic cylinder, V-shaped bionic cylinder has the best noise reduction effect, and the critical value of S/H of V-shaped cylinder is about 2.5. When s / h > 2.5, V-shaped bionic cylinder has no effect of noise reduction. |
| first_indexed | 2024-12-21T12:46:09Z |
| format | Article |
| id | doaj.art-a11717e53ff24dc0b575c026368de439 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-21T12:46:09Z |
| publishDate | 2021-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-a11717e53ff24dc0b575c026368de4392022-12-21T19:03:39ZengEDP SciencesMATEC Web of Conferences2261-236X2021-01-013360100310.1051/matecconf/202133601003matecconf_cscns20_01003Study on flow noise characteristics of Bionic cylinder based on acoustic analogyCui Zixian0Song Hao1Li Qi2An Buchao3Su Lin4Systems Engineering Research InstituteSystems Engineering Research InstituteSystems Engineering Research InstituteSystems Engineering Research InstituteSystems Engineering Research InstituteThe drag and noise reduction of the flow around a cylinder is one of the important topics in hydrodynamics and acoustics. In this paper, three typical bionic cylinders are designed based on the serrated structure on the surface of shark skin. Using Large eddy turbulence model and Lighthill’s acoustic analogy method, the flow noise characteristics of smooth cylinder and three kinds of bionic cylinders at different Reynolds numbers were compared, and the structure of cylinder surface was optimized. The results show that the main source of the flow noise around a cylinder is dipole noise, which is caused by the periodic fluctuating pressure on the cylinder surface.The bionic cylinder can reduce the amplitude of the fluctuating pressure, improve the wake flow field and reduce the wake vorticity, so as to reduce the noise. Among the three kinds of bionic cylinder, V-shaped bionic cylinder has the best noise reduction effect, and the critical value of S/H of V-shaped cylinder is about 2.5. When s / h > 2.5, V-shaped bionic cylinder has no effect of noise reduction.https://www.matec-conferences.org/articles/matecconf/pdf/2021/05/matecconf_cscns20_01003.pdf |
| spellingShingle | Cui Zixian Song Hao Li Qi An Buchao Su Lin Study on flow noise characteristics of Bionic cylinder based on acoustic analogy MATEC Web of Conferences |
| title | Study on flow noise characteristics of Bionic cylinder based on acoustic analogy |
| title_full | Study on flow noise characteristics of Bionic cylinder based on acoustic analogy |
| title_fullStr | Study on flow noise characteristics of Bionic cylinder based on acoustic analogy |
| title_full_unstemmed | Study on flow noise characteristics of Bionic cylinder based on acoustic analogy |
| title_short | Study on flow noise characteristics of Bionic cylinder based on acoustic analogy |
| title_sort | study on flow noise characteristics of bionic cylinder based on acoustic analogy |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2021/05/matecconf_cscns20_01003.pdf |
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