Evacuated tube maglev train (ETMT) system aims to advance ultra-high-speed transportation, featuring unique high-speed flow phenomena and complex shockwave dynamics in low-pressure environments that demand further exploration. This paper examines the flow structures and aerodynamic loads of the ETMT over a range of Mach numbers from 0.8 to 2.0. Leveraging a compressible, density-based solver based on the Advection Upstream Splitting Method, extensive numerical simulations of the ETMT were conducted across transonic and supersonic regimes, revealing diverse aerodynamic characteristics under varying operational conditions. The research delineates how aerodynamic properties distinctively shift with operating Mach numbers. In supersonic conditions, distinct shockwave effects emerge prominently, and as the train's velocity escalates, there is a consistent reduction in overall drag and lift coefficients, resulting in a net reduction of 32% in the total train drag coefficient (a most economical Mach number of 1.8) and the lift diminished by 38%. However, notable disparities exist in the drag and lift coefficients among different train sections. These insights are instrumental in understanding the aerodynamic behavior of tube trains at ultra-high speeds and serve as a crucial guide for the train's exterior design.
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December 2024
Research Article|
December 11 2024
Compressible effects of a supersonic evacuated tube maglev train at various Mach numbers
Special Collection:
Flow and Civil Structures
Zun-Di Huang (黄尊地);
Zun-Di Huang (黄尊地)
(Conceptualization, Funding acquisition, Methodology, Project administration)
1
School of Rail Transportation, Wuyi University
, Jiangmen 529000, China
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Cheng Peng (彭程)
;
Cheng Peng (彭程)
(Formal analysis, Software, Visualization, Writing – original draft)
2
School of Mechanical and Automation Engineering, Wuyi University
, Jiangmen 529000, China
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Zheng-Wei Chen (陈争卫)
;
Zheng-Wei Chen (陈争卫)
a)
(Supervision, Validation, Writing – review & editing)
3
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University
, Hong Kong, China
a)Author to whom correspondence should be addressed: [email protected]
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Zi-Jian Guo (郭子健);
Zi-Jian Guo (郭子健)
(Resources, Visualization)
3
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University
, Hong Kong, China
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Ning Chang (常宁);
Ning Chang (常宁)
(Writing – review & editing)
1
School of Rail Transportation, Wuyi University
, Jiangmen 529000, China
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Hong-Bei Chen (陈鸿倍);
Hong-Bei Chen (陈鸿倍)
(Software)
1
School of Rail Transportation, Wuyi University
, Jiangmen 529000, China
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Wei-Kai Kong (孔维锴);
Wei-Kai Kong (孔维锴)
(Software)
1
School of Rail Transportation, Wuyi University
, Jiangmen 529000, China
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You-Biao Wang (王友彪)
You-Biao Wang (王友彪)
(Resources)
4
Railway Science & Technology Research & Development Center, China Academy of Railway Sciences Corporation Limited
, Beijing 100081, China
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a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 36, 126126 (2024)
Article history
Received:
November 08 2024
Accepted:
November 22 2024
Citation
Zun-Di Huang, Cheng Peng, Zheng-Wei Chen, Zi-Jian Guo, Ning Chang, Hong-Bei Chen, Wei-Kai Kong, You-Biao Wang; Compressible effects of a supersonic evacuated tube maglev train at various Mach numbers. Physics of Fluids 1 December 2024; 36 (12): 126126. https://doi.org/10.1063/5.0247678
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