Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap
To investigate the mechanism of noise generation by a train-car gap, which is one of a major source of noise in Shinkansen trains, experiments were carried out in a wind tunnel using a 1/5-scale model train. We measured velocity profiles of the boundary layer that approaches the gap and confirmed th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2007-12-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/2/2/2_2_464/_pdf/-char/en |
| _version_ | 1818753694381899776 |
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| author | Fumio MIZUSHIMA Hiroyuki TAKAKURA Takeshi KURITA Chisachi KATO Akiyoshi IIDA |
| author_facet | Fumio MIZUSHIMA Hiroyuki TAKAKURA Takeshi KURITA Chisachi KATO Akiyoshi IIDA |
| author_sort | Fumio MIZUSHIMA |
| collection | DOAJ |
| description | To investigate the mechanism of noise generation by a train-car gap, which is one of a major source of noise in Shinkansen trains, experiments were carried out in a wind tunnel using a 1/5-scale model train. We measured velocity profiles of the boundary layer that approaches the gap and confirmed that the boundary layer is turbulent. We also measured the power spectrum of noise and surface pressure fluctuations around the train-car gap. Peak noise and broadband noise were observed. It is found that strong peak noise is generated when the vortex shedding frequency corresponds to the acoustic resonance frequency determined by the geometrical shape of the gap, and that broadband noise is generated at the downstream edge of the gap where vortexes collide. It is estimated that the convection velocity of the vortices in the gap is approximately 45% of the uniform flow velocity. |
| first_indexed | 2024-12-18T05:11:26Z |
| format | Article |
| id | doaj.art-60825474685348e196856cba9a1759a6 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-18T05:11:26Z |
| publishDate | 2007-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-60825474685348e196856cba9a1759a62022-12-21T21:19:53ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582007-12-012246447910.1299/jfst.2.464jfstExperimental Investigation of Aerodynamic Noise Generated by a Train-Car GapFumio MIZUSHIMA0Hiroyuki TAKAKURA1Takeshi KURITA2Chisachi KATO3Akiyoshi IIDA4Research and Development Center of JR East Group, East Japan Railway CompanySUGA Test InstrumentsResearch and Development Center of JR East Group, East Japan Railway CompanyInstitute of Industrial Science, The University of TokyoDepartment of Mechanical Engineering, Kogakuin UniversityTo investigate the mechanism of noise generation by a train-car gap, which is one of a major source of noise in Shinkansen trains, experiments were carried out in a wind tunnel using a 1/5-scale model train. We measured velocity profiles of the boundary layer that approaches the gap and confirmed that the boundary layer is turbulent. We also measured the power spectrum of noise and surface pressure fluctuations around the train-car gap. Peak noise and broadband noise were observed. It is found that strong peak noise is generated when the vortex shedding frequency corresponds to the acoustic resonance frequency determined by the geometrical shape of the gap, and that broadband noise is generated at the downstream edge of the gap where vortexes collide. It is estimated that the convection velocity of the vortices in the gap is approximately 45% of the uniform flow velocity.https://www.jstage.jst.go.jp/article/jfst/2/2/2_2_464/_pdf/-char/enaerodynamic noiseturbulent flowsound and acousticflow measurementrailway |
| spellingShingle | Fumio MIZUSHIMA Hiroyuki TAKAKURA Takeshi KURITA Chisachi KATO Akiyoshi IIDA Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap Journal of Fluid Science and Technology aerodynamic noise turbulent flow sound and acoustic flow measurement railway |
| title | Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap |
| title_full | Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap |
| title_fullStr | Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap |
| title_full_unstemmed | Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap |
| title_short | Experimental Investigation of Aerodynamic Noise Generated by a Train-Car Gap |
| title_sort | experimental investigation of aerodynamic noise generated by a train car gap |
| topic | aerodynamic noise turbulent flow sound and acoustic flow measurement railway |
| url | https://www.jstage.jst.go.jp/article/jfst/2/2/2_2_464/_pdf/-char/en |
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