Key vacuum technology issues to be solved in evacuated tube transportation

Zhang, Yaoping; Oster, Daryl; Kumada, М.; Jiang, Yu; Li, Shengshan

doi:10.1007/bf03325748

Cited by 25 publications

(15 citation statements)

References 1 publication

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“…Figure 2 shows a simplified scheme of the two-tube design using TRM trains (Janić 2014;Salter 1972;Sirohiwala, Tandon, and Vysetty 2007). The floating tubes could be made of either thermal conductive pure steel guaranteeing air-proof at a rather moderate cost or of composite materials including steel and concrete layers at the inner and outside wall of the tube, respectively (Zhang et al 2011). The thickness of the tube walls has to be sufficient to sustain the water pressure at given depths from the outside and almost zero pressure from the inside (at a depth of 300 m the outside pressure is about 30 atmospheres (atm)), that is, the pressure increases by one atm for each 10 m of depth.…”

Section: Tubes/tunnels and Stations/terminalsmentioning

confidence: 99%

Future advanced long-haul Evacuated Tube Transport (EET) system operated by TransRapid Maglev (TRM): a multidimensional examination of performance

Janić

2019

Transportation Planning and Technology

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This paper presents a multidimensional examination of the infrastructural, technical/technological, operational, economic, environmental, social, and policy performance of the future advanced Evacuated Tube Transport (ETT) system operated by TransRapid Maglev (TRM) (the ETT-TRM system). The examination implies analyzing, modeling, and estimating selected performance criteria using the case of the TransAtlantic passenger transport market currently served exclusively by the Air Passenger Transport (APT) system. The purpose is to assess the ETT-TRM system's competitive capabilities compared to those of the current and future APT system and consequently its potential contribution to mitigating impacts of both systems on society and the environmentthe sustainability of the transport sector-under given conditions.

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Section: Tubes/tunnels and Stations/terminalsmentioning

confidence: 99%

Future advanced long-haul Evacuated Tube Transport (EET) system operated by TransRapid Maglev (TRM): a multidimensional examination of performance

Janić

2019

Transportation Planning and Technology

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“…The vacuum tube train system needs to take into consideration many more parameters in comparison to the conventional trains. Kim et al (2011) and Zhang et al (2011) shows that the aerodynamic drag, development of shocks and maintenance of low pressures in the tube are the major drawbacks which need to be controlled in order to get a successful transportation system. Hence there is a requirement to study the aerodynamic drag acting on these bodies in order to find out the suitable ranges of pressure to be maintained in the tunnel, velocity that the trains can run and the suitable geometry for the trains, Zhi-yun et al (2005) and Chen et al (2012).…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Aerodynamic Drag Effects on Vacuum Tube Trains

Gillani

Panikulam

Sadasivan

et al. 2019

JAFM

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Aerodynamic aspects of train shapes suitable for Vacuum Tube Train System are investigated in this paper. Three feasible geometries for the vacuum tube train system have been considered and modelled in three dimensions and have been computationally studied using the commercial software Ansys Fluent. Aerodynamic drag loads on these geometries have been calculated under different tube pressures and speeds of the train, which provide insight on various operating parameters that need to be considered while designing the vacuum tube train system. The present computational research shows that, the suitable vacuum pressure, and different shapes of head and tail of the train have significantly effects the drag force of the vacuum train in the tunnel. Overall, the elliptical train shape with a height to base ratio of 2:1 is more efficient for aerodynamic drag reduction of the vacuum tube train at the vacuum tube pressure of 1013.25 Pa.

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“…In this paper, we analyze a number of issues that arise when considering possible options for the implementation of trans-Eurasian high-speed ground corridors operating on the basis of vacuum magnetic levitation transport (VMLT). A very extensive literature is devoted to a discussion of the comprehensive aspects of the application of magnetic levitation technologies in transport, including in vacuum tubes, from a wide variety of points of view [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Note that the conclusions made after a very versatile and detailed analysis of the expediency of using these technologies at the present time often turn out to be contradictive (it suffices to compare [2,3,4,7,10]).…”

Section: Introductionmentioning

confidence: 99%

Dzungaria corridor for vacuum magnetic levitation transport: lost opportunities or weighted optimism?

Bogachev

Алексеевич²,

Terentyev³

et al. 2018

Transportation Systems and Technology

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Background: The complex of issues arising when considering possible options for the implementation of Eurasian transcontinental high-speed land transport corridors operating on the basis of vacuum magnetic-levitation technologies is analyzed. The exclusivity of Russia’s geographical position in a substantial part lies in the fact that it is through its territory that China can be directly linked by these corridors to Western Europe and also to North America, the rationale is done. Aim: Possible routes connecting Beijing and Shanghai with Moscow are analyzed. Transport highways of a truly innovative type will solve the urgent task of geopolitical level - to organize the states located on the Eurasian continent in a qualitatively new civilizational construction. The purpose of the research is as follows: to develop methods of solving the problems of finding optimal variants for the location of high-speed land transport corridors using computer mathematics systems. This should take into account the features of the territory, through which the transport route is planned to be carried out. Methods: The economic, political, logistical, geographical, technical and technological aspects of these projects are discussed. Optimization methods are used, in particular, the calculus of variations. Results: After the creation of a sufficiently informative and detailed informal picture, the basics of the corresponding mathematical models are constructed. Conclusion: The historical area of Dzungaria is considered as the location of the main intermediate terminal for high speed vacuum magnetic levitation transport.

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Key vacuum technology issues to be solved in evacuated tube transportation

Cited by 25 publications

References 1 publication

Future advanced long-haul Evacuated Tube Transport (EET) system operated by TransRapid Maglev (TRM): a multidimensional examination of performance

Future advanced long-haul Evacuated Tube Transport (EET) system operated by TransRapid Maglev (TRM): a multidimensional examination of performance

CFD Analysis of Aerodynamic Drag Effects on Vacuum Tube Trains

Dzungaria corridor for vacuum magnetic levitation transport: lost opportunities or weighted optimism?

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