Aerodynamic energy consumption analysis of divided evacuated tube transportation system
Evacuated Tube Transportation (ETT) reduces aerodynamic drag and energy consumption by lowering gas pressure around high-speed trains (HSTs). To optimise this effect, integrating the ETT system into high-speed cruise segments is a practical approach, though it may introduce vacuum potential energy l...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
|
| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2025.2454296 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832557432392384512 |
|---|---|
| author | Ziwei Zhang Yingxue Wang Guanqing Wang Feilong Li Dengke Wang Jianjun Luo |
| author_facet | Ziwei Zhang Yingxue Wang Guanqing Wang Feilong Li Dengke Wang Jianjun Luo |
| author_sort | Ziwei Zhang |
| collection | DOAJ |
| description | Evacuated Tube Transportation (ETT) reduces aerodynamic drag and energy consumption by lowering gas pressure around high-speed trains (HSTs). To optimise this effect, integrating the ETT system into high-speed cruise segments is a practical approach, though it may introduce vacuum potential energy losses. To address this, the paper put forward a Divided Evacuated Tube Transportation (D-ETT) system to seamlessly connect open-line and tube operation of HST then the regulations of aerodynamic energy consumption were studied. Theoretical discussions into reasonable parameter range including tube design and HST operation manners were conducted and then formed system-designing strategy. The spatial and temporal distribution law of tube gas circumstances were examined through model testing and numerical simulation. Three-dimensional, unsteady and compressible fluid models were established using Large Eddy Simulation (LES) to analyse tube fluid characteristics. Relative results indicated that under reasonable D-ETT designing strategies with larger blockage ratios, higher HST speeds, larger total mileage and mileage ratio of the mid-section, the aerodynamic energy saving effect is more impressive. The mixing of the adjacent tube gases with differential pressure induced gas-mixing fluctuations then changed the fluid circumstances inside the tube. The positional relationship between HST and gas waves infected aerodynamic energy consumption. By figuring out the spatiotemporal variation of tube gas, the theoretical energy estimation scheme for aerodynamic energy consumption with various cases was put forward, then the rationality and accuracy of which was verified by numerical simulation with prediction error less than 8%. The saving ratio of aerodynamic drag energy consumption of a 10 km tube could be 39.9% compared to traditional tunnels, which will be higher under ultra-long mileage, thus realising the overall aerodynamic energy saving effect. High-amplitude pressure waves intensified the pressure changes around HSTs, making it necessary to use HST capsules with superior sealing performance to ensure eardrum comfort. |
| format | Article |
| id | doaj-art-878a3baeb343461f8962233915de6c2f |
| institution | Kabale University |
| issn | 1994-2060 1997-003X |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj-art-878a3baeb343461f8962233915de6c2f2025-02-03T05:06:43ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2025-12-0119110.1080/19942060.2025.2454296Aerodynamic energy consumption analysis of divided evacuated tube transportation systemZiwei Zhang0Yingxue Wang1Guanqing Wang2Feilong Li3Dengke Wang4Jianjun Luo5Key Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing, People’s Republic of ChinaState Key Laboratory of Intelligent Geotechnics and Tunnelling, Southwest Jiaotong University, Chengdu, People's Republic of ChinaKey Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing, People’s Republic of ChinaKey Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing, People’s Republic of ChinaKey Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing, People’s Republic of ChinaKey Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing, People’s Republic of ChinaEvacuated Tube Transportation (ETT) reduces aerodynamic drag and energy consumption by lowering gas pressure around high-speed trains (HSTs). To optimise this effect, integrating the ETT system into high-speed cruise segments is a practical approach, though it may introduce vacuum potential energy losses. To address this, the paper put forward a Divided Evacuated Tube Transportation (D-ETT) system to seamlessly connect open-line and tube operation of HST then the regulations of aerodynamic energy consumption were studied. Theoretical discussions into reasonable parameter range including tube design and HST operation manners were conducted and then formed system-designing strategy. The spatial and temporal distribution law of tube gas circumstances were examined through model testing and numerical simulation. Three-dimensional, unsteady and compressible fluid models were established using Large Eddy Simulation (LES) to analyse tube fluid characteristics. Relative results indicated that under reasonable D-ETT designing strategies with larger blockage ratios, higher HST speeds, larger total mileage and mileage ratio of the mid-section, the aerodynamic energy saving effect is more impressive. The mixing of the adjacent tube gases with differential pressure induced gas-mixing fluctuations then changed the fluid circumstances inside the tube. The positional relationship between HST and gas waves infected aerodynamic energy consumption. By figuring out the spatiotemporal variation of tube gas, the theoretical energy estimation scheme for aerodynamic energy consumption with various cases was put forward, then the rationality and accuracy of which was verified by numerical simulation with prediction error less than 8%. The saving ratio of aerodynamic drag energy consumption of a 10 km tube could be 39.9% compared to traditional tunnels, which will be higher under ultra-long mileage, thus realising the overall aerodynamic energy saving effect. High-amplitude pressure waves intensified the pressure changes around HSTs, making it necessary to use HST capsules with superior sealing performance to ensure eardrum comfort.https://www.tandfonline.com/doi/10.1080/19942060.2025.2454296Divided evacuated tube transportation (D-ETT) systemhigh speed train (HST)aerodynamic dragvacuum potential energycomputational fluid dynamics (CFD)eardrum comfort |
| spellingShingle | Ziwei Zhang Yingxue Wang Guanqing Wang Feilong Li Dengke Wang Jianjun Luo Aerodynamic energy consumption analysis of divided evacuated tube transportation system Engineering Applications of Computational Fluid Mechanics Divided evacuated tube transportation (D-ETT) system high speed train (HST) aerodynamic drag vacuum potential energy computational fluid dynamics (CFD) eardrum comfort |
| title | Aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| title_full | Aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| title_fullStr | Aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| title_full_unstemmed | Aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| title_short | Aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| title_sort | aerodynamic energy consumption analysis of divided evacuated tube transportation system |
| topic | Divided evacuated tube transportation (D-ETT) system high speed train (HST) aerodynamic drag vacuum potential energy computational fluid dynamics (CFD) eardrum comfort |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2025.2454296 |
| work_keys_str_mv | AT ziweizhang aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem AT yingxuewang aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem AT guanqingwang aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem AT feilongli aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem AT dengkewang aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem AT jianjunluo aerodynamicenergyconsumptionanalysisofdividedevacuatedtubetransportationsystem |