Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel
In order to investigate pressure variations on both the tunnel wall and train body surface when 140 km/h medium-low-speed maglev trains intersect in two-track tunnels, numerical calculations were performed, focusing on the effects of different parameters of the train/tunnel on the aerodynamic perfor...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Drive for Locomotives
2024-05-01
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| Series: | 机车电传动 |
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| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2024.03.008 |
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| author | JIAO Qizhu ZHANG Mingju XIONG Xiaohui WANG Kaiwen CHEN Bo |
| author_facet | JIAO Qizhu ZHANG Mingju XIONG Xiaohui WANG Kaiwen CHEN Bo |
| author_sort | JIAO Qizhu |
| collection | DOAJ |
| description | In order to investigate pressure variations on both the tunnel wall and train body surface when 140 km/h medium-low-speed maglev trains intersect in two-track tunnels, numerical calculations were performed, focusing on the effects of different parameters of the train/tunnel on the aerodynamic performance of the tunnel wall and train body surface. Moreover, a comparison was conducted across different train consist lengths and various tunnel clearance areas to assess their effects on internal train pressures. The results indicated an inversely proportional relationship between the peak value of pressure variations at measuring points on the tunnel wall and the 1.379th power of the tunnel clearance area, as well as between the peak value of pressure variations at measuring points on the train body surface and the 1.231st power of the tunnel clearance area during the intersection of 4-car maglev trains in the middle section of two-track tunnels. Additionally, under an airtightness index of 0.5 s, the pressure variations over 3 s at measuring points inside 8-car trains resulting from the intersection in tunnels with a tunnel clearance area of 66.2 m<sup>2</sup> increased by 102.2%, compared with the 4-car scenarios. Under an airtightness index of 8 s, this figure decreased to 50.4%. The study findings of this paper provide a reference basis for the construction of tunnels to accommodate the operation of medium-low-speed maglev trains. |
| format | Article |
| id | doaj-art-73b05864d8e842cc82042e13d7edff73 |
| institution | OA Journals |
| issn | 1000-128X |
| language | zho |
| publishDate | 2024-05-01 |
| publisher | Editorial Department of Electric Drive for Locomotives |
| record_format | Article |
| series | 机车电传动 |
| spelling | doaj-art-73b05864d8e842cc82042e13d7edff732025-08-20T01:51:10ZzhoEditorial Department of Electric Drive for Locomotives机车电传动1000-128X2024-05-01616963966135Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnelJIAO QizhuZHANG MingjuXIONG XiaohuiWANG KaiwenCHEN BoIn order to investigate pressure variations on both the tunnel wall and train body surface when 140 km/h medium-low-speed maglev trains intersect in two-track tunnels, numerical calculations were performed, focusing on the effects of different parameters of the train/tunnel on the aerodynamic performance of the tunnel wall and train body surface. Moreover, a comparison was conducted across different train consist lengths and various tunnel clearance areas to assess their effects on internal train pressures. The results indicated an inversely proportional relationship between the peak value of pressure variations at measuring points on the tunnel wall and the 1.379th power of the tunnel clearance area, as well as between the peak value of pressure variations at measuring points on the train body surface and the 1.231st power of the tunnel clearance area during the intersection of 4-car maglev trains in the middle section of two-track tunnels. Additionally, under an airtightness index of 0.5 s, the pressure variations over 3 s at measuring points inside 8-car trains resulting from the intersection in tunnels with a tunnel clearance area of 66.2 m<sup>2</sup> increased by 102.2%, compared with the 4-car scenarios. Under an airtightness index of 8 s, this figure decreased to 50.4%. The study findings of this paper provide a reference basis for the construction of tunnels to accommodate the operation of medium-low-speed maglev trains.http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2024.03.008maglev trainaerodynamic characteristicstwo-track tunnelaerodynamicsnumerical calculation |
| spellingShingle | JIAO Qizhu ZHANG Mingju XIONG Xiaohui WANG Kaiwen CHEN Bo Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel 机车电传动 maglev train aerodynamic characteristics two-track tunnel aerodynamics numerical calculation |
| title | Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel |
| title_full | Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel |
| title_fullStr | Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel |
| title_full_unstemmed | Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel |
| title_short | Aerodynamic characteristics of medium-low-speed maglev trains during intersection in two-track tunnel |
| title_sort | aerodynamic characteristics of medium low speed maglev trains during intersection in two track tunnel |
| topic | maglev train aerodynamic characteristics two-track tunnel aerodynamics numerical calculation |
| url | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2024.03.008 |
| work_keys_str_mv | AT jiaoqizhu aerodynamiccharacteristicsofmediumlowspeedmaglevtrainsduringintersectionintwotracktunnel AT zhangmingju aerodynamiccharacteristicsofmediumlowspeedmaglevtrainsduringintersectionintwotracktunnel AT xiongxiaohui aerodynamiccharacteristicsofmediumlowspeedmaglevtrainsduringintersectionintwotracktunnel AT wangkaiwen aerodynamiccharacteristicsofmediumlowspeedmaglevtrainsduringintersectionintwotracktunnel AT chenbo aerodynamiccharacteristicsofmediumlowspeedmaglevtrainsduringintersectionintwotracktunnel |