On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface
Abstract This work proposes a noise-reduction structure that integrates phase-modulating metasurface (PMM) with acoustic liners (ALs) to enhance the narrow band absorption performance of a duct with relatively small length-diameter ratio. The PMM manipulates the wavefront by introducing different tr...
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-49592-2 |
| _version_ | 1797388338294947840 |
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| author | Yang Ou Yonghui Zhao |
| author_facet | Yang Ou Yonghui Zhao |
| author_sort | Yang Ou |
| collection | DOAJ |
| description | Abstract This work proposes a noise-reduction structure that integrates phase-modulating metasurface (PMM) with acoustic liners (ALs) to enhance the narrow band absorption performance of a duct with relatively small length-diameter ratio. The PMM manipulates the wavefront by introducing different transmission phase shifts based on an array of Helmholtz resonators, so that the spinning wave within the duct can be generated. Compared with the plane wave, the generated spinning wave has a lower group velocity, which results in a greater traveling distance over the ALs in the duct. The optimization design is performed to determine the final structural parameters of the PMM, which is based on the predictions of the amplitude and phase shift of the acoustic wave at the outlet of the PMM using the theory of passive phased array. With the manipulation of the PMM, the incident plane wave is modulated into a spinning wave, and then enters into the acoustic liner duct (ALD), whose structural parameters are optimized by maximizing the transmission loss using the mode-matching technique. Finally, the noise-reduction performance of this combined structure is evaluated by numerical simulations in the presence of grazing flow. The results demonstrate that, compared with the traditional ALD, the proposed structure exhibits a significant increase in transmission loss within the considered frequency band, especially near the peak frequency of the narrow band noise. |
| first_indexed | 2024-03-08T22:38:20Z |
| format | Article |
| id | doaj.art-57f323da4ce94eaa898c64916960b663 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-08T22:38:20Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-57f323da4ce94eaa898c64916960b6632023-12-17T12:17:50ZengNature PortfolioScientific Reports2045-23222023-12-0113112010.1038/s41598-023-49592-2On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurfaceYang Ou0Yonghui Zhao1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and AstronauticsState Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and AstronauticsAbstract This work proposes a noise-reduction structure that integrates phase-modulating metasurface (PMM) with acoustic liners (ALs) to enhance the narrow band absorption performance of a duct with relatively small length-diameter ratio. The PMM manipulates the wavefront by introducing different transmission phase shifts based on an array of Helmholtz resonators, so that the spinning wave within the duct can be generated. Compared with the plane wave, the generated spinning wave has a lower group velocity, which results in a greater traveling distance over the ALs in the duct. The optimization design is performed to determine the final structural parameters of the PMM, which is based on the predictions of the amplitude and phase shift of the acoustic wave at the outlet of the PMM using the theory of passive phased array. With the manipulation of the PMM, the incident plane wave is modulated into a spinning wave, and then enters into the acoustic liner duct (ALD), whose structural parameters are optimized by maximizing the transmission loss using the mode-matching technique. Finally, the noise-reduction performance of this combined structure is evaluated by numerical simulations in the presence of grazing flow. The results demonstrate that, compared with the traditional ALD, the proposed structure exhibits a significant increase in transmission loss within the considered frequency band, especially near the peak frequency of the narrow band noise.https://doi.org/10.1038/s41598-023-49592-2 |
| spellingShingle | Yang Ou Yonghui Zhao On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface Scientific Reports |
| title | On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface |
| title_full | On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface |
| title_fullStr | On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface |
| title_full_unstemmed | On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface |
| title_short | On enhancing the noise-reduction performance of the acoustic lined duct utilizing the phase-modulating metasurface |
| title_sort | on enhancing the noise reduction performance of the acoustic lined duct utilizing the phase modulating metasurface |
| url | https://doi.org/10.1038/s41598-023-49592-2 |
| work_keys_str_mv | AT yangou onenhancingthenoisereductionperformanceoftheacousticlinedductutilizingthephasemodulatingmetasurface AT yonghuizhao onenhancingthenoisereductionperformanceoftheacousticlinedductutilizingthephasemodulatingmetasurface |