Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph
The pantograph is the main noise source of high-speed trains, of which the middle and upper parts of the pantograph account for about 50% of the whole noise energy. Taking CRH380BL pantograph as the basic prototype, three aerodynamic noise reduction measures of opening, slotting, and airfoil are int...
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8704 |
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| author | Jing Guo Xiao-Ming Tan Zhi-Gang Yang Yu-Qi Xue Ya-Nan Shen Hao-Wei Wang |
| author_facet | Jing Guo Xiao-Ming Tan Zhi-Gang Yang Yu-Qi Xue Ya-Nan Shen Hao-Wei Wang |
| author_sort | Jing Guo |
| collection | DOAJ |
| description | The pantograph is the main noise source of high-speed trains, of which the middle and upper parts of the pantograph account for about 50% of the whole noise energy. Taking CRH380BL pantograph as the basic prototype, three aerodynamic noise reduction measures of opening, slotting, and airfoil are introduced to build a new pantograph, and their aeroacoustic performances are comprehensively investigated through large eddy simulation (LES) and Ffowcs Williams–Hawkings (FW-H) equation method. The research results show that the open upper and lower arms (ULA) can reduce the downstream vorticity intensity and vortex structure scale, which in turn reduces the noise source intensity, thus reducing their radiated noise by approximately 1.1 dBA. The slotted ULA reduce the size of the rear vortex structure but increase the vorticity intensity, so it is difficult to effectively control their radiated noise. The airfoil bow head reduces the vorticity intensity and vortex structure scale behind it, and avoids periodic vortex shedding, thereby reducing its noise source intensity, thus reducing its radiated noise by about 1.2 dBA. |
| first_indexed | 2024-03-10T03:02:13Z |
| format | Article |
| id | doaj.art-de94e855945d4fe9bb5c7f4d04289501 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:02:13Z |
| publishDate | 2022-08-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-de94e855945d4fe9bb5c7f4d042895012023-11-23T12:45:25ZengMDPI AGApplied Sciences2076-34172022-08-011217870410.3390/app12178704Aeroacoustic Optimization Design of the Middle and Upper Part of PantographJing Guo0Xiao-Ming Tan1Zhi-Gang Yang2Yu-Qi Xue3Ya-Nan Shen4Hao-Wei Wang5College of Mechanical Engineering Hunan Institute of Science Technology, Yueyang 4140083, ChinaCollege of Mechanical Engineering Hunan Institute of Science Technology, Yueyang 4140083, ChinaKey Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaCollege of Mechanical Engineering Hunan Institute of Science Technology, Yueyang 4140083, ChinaCollege of Mechanical Engineering Hunan Institute of Science Technology, Yueyang 4140083, ChinaCollege of Mechanical Engineering Hunan Institute of Science Technology, Yueyang 4140083, ChinaThe pantograph is the main noise source of high-speed trains, of which the middle and upper parts of the pantograph account for about 50% of the whole noise energy. Taking CRH380BL pantograph as the basic prototype, three aerodynamic noise reduction measures of opening, slotting, and airfoil are introduced to build a new pantograph, and their aeroacoustic performances are comprehensively investigated through large eddy simulation (LES) and Ffowcs Williams–Hawkings (FW-H) equation method. The research results show that the open upper and lower arms (ULA) can reduce the downstream vorticity intensity and vortex structure scale, which in turn reduces the noise source intensity, thus reducing their radiated noise by approximately 1.1 dBA. The slotted ULA reduce the size of the rear vortex structure but increase the vorticity intensity, so it is difficult to effectively control their radiated noise. The airfoil bow head reduces the vorticity intensity and vortex structure scale behind it, and avoids periodic vortex shedding, thereby reducing its noise source intensity, thus reducing its radiated noise by about 1.2 dBA.https://www.mdpi.com/2076-3417/12/17/8704pantographaerodynamic noiselarge eddy simulationoptimal design |
| spellingShingle | Jing Guo Xiao-Ming Tan Zhi-Gang Yang Yu-Qi Xue Ya-Nan Shen Hao-Wei Wang Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph Applied Sciences pantograph aerodynamic noise large eddy simulation optimal design |
| title | Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph |
| title_full | Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph |
| title_fullStr | Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph |
| title_full_unstemmed | Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph |
| title_short | Aeroacoustic Optimization Design of the Middle and Upper Part of Pantograph |
| title_sort | aeroacoustic optimization design of the middle and upper part of pantograph |
| topic | pantograph aerodynamic noise large eddy simulation optimal design |
| url | https://www.mdpi.com/2076-3417/12/17/8704 |
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