Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings
The reduction of aerodynamic noise emitted from a circular cylinder was investigated experimentally by attaching the cylindrical rings arranged in the axial direction of the cylinder. The Reynolds number based on the cylinder diameter d was ranged from Re = (2.0 to 3.9) × 104. The sound pressure lev...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2020-09-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/86/889/86_20-00081/_pdf/-char/en |
| _version_ | 1811308723243581440 |
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| author | Hidetoshi SANO Shunsuke YAMADA Yuki FUNAMI Hajime NAKAMURA |
| author_facet | Hidetoshi SANO Shunsuke YAMADA Yuki FUNAMI Hajime NAKAMURA |
| author_sort | Hidetoshi SANO |
| collection | DOAJ |
| description | The reduction of aerodynamic noise emitted from a circular cylinder was investigated experimentally by attaching the cylindrical rings arranged in the axial direction of the cylinder. The Reynolds number based on the cylinder diameter d was ranged from Re = (2.0 to 3.9) × 104. The sound pressure level was reduced up to 14 dB by attaching the rings of the diameter Dr/d = 1.3 and the width W/d = 1.0, which was arranged at the spanwise pitch P/d = 4. At this configuration, a 1/3 octave band analysis showed a reduction of the sound pressure up to 26 dB at the frequency band of the vortex shedding from a circular cylinder. The result of the PIV measurements showed that the reduction of the sound pressure is related to the reduction of the Reynolds stress in the wake, which is mainly caused by the suppression of the periodic vortex shedding. |
| first_indexed | 2024-04-13T09:28:25Z |
| format | Article |
| id | doaj.art-fb8eeddc3e2a4645b9fc70fc86f19a45 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T09:28:25Z |
| publishDate | 2020-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-fb8eeddc3e2a4645b9fc70fc86f19a452022-12-22T02:52:22ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612020-09-018688920-0008120-0008110.1299/transjsme.20-00081transjsmeStudy on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical ringsHidetoshi SANO0Shunsuke YAMADA1Yuki FUNAMI2Hajime NAKAMURA3Graduate School of Science and Engineering, National Defense AcademyDepartment of Mechanical Engineering, National Defense AcademyDepartment of Mechanical Engineering, National Defense AcademyDepartment of Mechanical Engineering, National Defense AcademyThe reduction of aerodynamic noise emitted from a circular cylinder was investigated experimentally by attaching the cylindrical rings arranged in the axial direction of the cylinder. The Reynolds number based on the cylinder diameter d was ranged from Re = (2.0 to 3.9) × 104. The sound pressure level was reduced up to 14 dB by attaching the rings of the diameter Dr/d = 1.3 and the width W/d = 1.0, which was arranged at the spanwise pitch P/d = 4. At this configuration, a 1/3 octave band analysis showed a reduction of the sound pressure up to 26 dB at the frequency band of the vortex shedding from a circular cylinder. The result of the PIV measurements showed that the reduction of the sound pressure is related to the reduction of the Reynolds stress in the wake, which is mainly caused by the suppression of the periodic vortex shedding.https://www.jstage.jst.go.jp/article/transjsme/86/889/86_20-00081/_pdf/-char/enaeroacoustic noisecircular cylindervortex sheddingpassive flow controlfft analysis |
| spellingShingle | Hidetoshi SANO Shunsuke YAMADA Yuki FUNAMI Hajime NAKAMURA Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings Nihon Kikai Gakkai ronbunshu aeroacoustic noise circular cylinder vortex shedding passive flow control fft analysis |
| title | Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| title_full | Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| title_fullStr | Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| title_full_unstemmed | Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| title_short | Study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| title_sort | study on the reduction of aeroacoustic noise from a circular cylinder attached with cylindrical rings |
| topic | aeroacoustic noise circular cylinder vortex shedding passive flow control fft analysis |
| url | https://www.jstage.jst.go.jp/article/transjsme/86/889/86_20-00081/_pdf/-char/en |
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