Design consideration of a super-high speed high temperature superconductor maglev evacuated tube transport (I)

Abstract

The super-high speed high temperature superconductor (HTS) maglev evacuated tube transport (ETT) is a promising transport mode for the future. As a key component of the HTS maglev vehicle, the permanent magnet guideways (PMGs) with different geometrical configurations and iron yoke widths are analyzed by finite element method (FEM). The levitation force of a single onboard HTS maglev device over the designed PMG at different field cooling heights (FCH) is measured by magnetic levitation measurement system. Based on the designed PMG and experimental results, a preliminary scheme of subterranean super-high speed HTS maglev ETT is described in this paper. The HTS maglev ETT is mainly composed of an evacuated tube, HTS maglev vehicle, PMG, propulsion system, station, emergency rescue system, etc. In addition, a subterranean tube that consists of foundation tube and vacuum airproof layer is introduced. In order to convert the stress caused by the air pressure difference between inside and outside of the vehicle, a multi-circular vehicle body is designed. The vehicle is driven by a linear motor propulsion system under the control of a ground controlling system. The scheme of long-distance super-high speed passenger transportation is accomplished by the connection of different vehicles.

Aerodynamic load analyses of less-emission HTS maglev train in evacuated tube transport system

“…In addition, in the 1970s and the 1980s, United States researchers developed and refined the concepts of the ETT-Maglev transport like "Planetran", "StarTram", and "ET3" (Mossi and Sibilla, 2002;Jufer et al, 2006). Limited by the development of maglev technology at that time, the ETT-Maglev researches were mainly in the stage of theoretical research, and there were no substantial test lines in the world (Oster et al, 2011;Zhang et al, 2011;Jiang et al, 2012). In June 2014, the HTS Maglev research team in Southwest Jiaotong University successfully developed an evacuated tube HTS Maglev test platform "Super-Maglev" (Deng et al, 2017), as shown in Figure 1, which strongly demonstrates the feasibility and potential merits of the ETT-HTS Maglev transportation concept.…”

Numerical Study on the Aerodynamics of the Evacuated Tube Transportation System from Subsonic to Supersonic

“…In this study, the novel evacuated tube transportation (ETT) system was investigated, which has a higher speed, higher security, lower energy consumption, less noise, and less pollution. The basic idea of the ETT system is that the train moves in a closed tube that draws a certain amount of vacuum, and uses maglev technology or compressed air cushion to levitate the train over a certain distance on the track [1][2][3][4][5][6][7]. Consequently, almost all of the drag of the train in tubes comes from the aerodynamic drag.…”

The approach to calculate the aerodynamic drag of maglev train in the evacuated tube

“…Shu et al [10] simulated the flow field around the train based on the 3D compressible viscous fluid theory and draw the conclusion that its aerodynamic performance is relevant to the length of the streamlined nose. In [11][12][13], the simulated results showed that the speed, the pressure and the blockage ratio significantly affect the aerodynamic drag of the train in an evacuated tube.…”