• Title, Summary, Keyword: Super-speed tube train

Search Result 5, Processing Time 0.033 seconds

Analysis of the Magnetic Effect on the Tube Infrastructure for a Super Speed Tube Train

  • Lee, Hyung-Woo;Cho, Su-Yeon;Cho, Woo-Yeon;Lee, Ju;Kwon, Hyeok-Bin
    • International Journal of Railway
    • /
    • v.2 no.4
    • /
    • pp.170-174
    • /
    • 2009
  • Super speed tube train is introduced to increase the speed of ground transportation. The super speed tube train levitates magnetically and runs in a partial vacuum tube, which can reduce the air resistance significantly. However, the strong magnetic force enough to propel the massive train can affect to the tube infrastructure. In this paper, authors have analyzed the leakage flux patterns and induced eddy current on the tube by using 3-dimensional Finite Element Method. These effects are investigated, especially by varying the materials and diameters of the tube. From the simulation results, the aluminum tube with the diameter of 3[m] is needed to be concerned because the induced eddy current produces joule heat, raises the inside temperature of the tube, and might be able to lead to electro-chemical corrosion on the tube, consequently reduce the durability.

  • PDF

Magnetic Interference on the Infrastructure for a Super-speed Tube Train

  • Lee, Hyung-Woo;Jang, Seung-Yup;Kang, Bu-Byoung;Cho, Su-Yeon;Lee, Ju
    • Journal of Electrical Engineering and Technology
    • /
    • v.6 no.3
    • /
    • pp.364-368
    • /
    • 2011
  • The super-speed tube train was introduced to increase the speed of ground transportation. It levitates magnetically and runs in a partial vacuum tube, which significantly reduces air resistance. However, strong magnetic force sufficient to propel the massive train can affect the infrastructure. The induced eddy current produces joule heat, and raises the inside temperature of the girder, which might lead to electrochemical corrosion on the girder, thereby weakening its durability. In this paper, the authors analyzed the magnetic flux and induced eddy current in the reinforced concrete girder by using three-dimensional FEM, particularly by varying the number of reinforcing steels of the upper flange of the girder to the condition of almost the same flexural strength and reinforcing steel amount.

Experimental Study for the Speed-up of a Super-speed Train Model in the Partial Vacuum Tunnel (아진공 터널에서 초고속 열차의 속도향상에 관한 실험적 연구)

  • Kim, Dong-Hyeon;Kim, Jae-Heung
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.2064-2071
    • /
    • 2011
  • We are developing an innovative super-speed land transportation system running in a partial vacuum in tunnels with small inside diameter to reduce the aerodynamic drag forces. This paper presents the experimental results obtained on a small scale model when a super-speed train model passing through a tunnel with small inside diameter and a partial vacuum to reduce the aerodynamic drag forces. The experiments were performed on a 1/52-scale moving model rig in which a train model with a diameter of 58 mm and a length of 603 mm was accelerated in a launching tube with 12.27 m length by means of the compressed air launcher and then passed through a tunnel model with 17.149 m length. The partial vacuum was maintained in the tunnel in order to reduce the energy consumption of the propulsion system of the super-speed tube train at super-speed of 700 km/h. In this study, the blockage ratio of train to tunnel model is 0.336. Experimental results show the nonlinear effects of the vacuum on the speed-up of the train model in the tunnel model under the partial vacuum up to 0.21 atm and at the velocity up to 684 km/h. This paper is first study for experiments on the speed-up of a super-speed train model in the partial vacuum tunnels.

  • PDF

Parametric Study on the Capacity of Vacuum Pump for Tube Structure (튜브열차 구조물의 진공 펌프 용량에 관한 파라메타 연구)

  • Nam, Seong-Won
    • Journal of the Korean Society for Railway
    • /
    • v.13 no.5
    • /
    • pp.516-520
    • /
    • 2010
  • Parametric study has been conducted to calculate the capacity of vacuum pump system that will be used to maintain the pressure of the tube structure under atmosphere level. Recently many railroad researchers pay attention to the tube train system as one of the super high speed transportation system. To achieve the super high speed, the inside of tube system should be maintained at low pressure level. In the low pressure environment, it is well known that air resistance of train is drastically decreased. Vacuum pump system will be used to make low pressure state for tube structure, exhaust the leakage air and supplement additional vacuum pumping. As results of these studies, we get the lump capacity of vacuum pump for various parameters. These results can be applied to analyze the effects of the reduction of air resistance.

Study on Vacuum Pump Capacity with Leakage of Tube Structure (튜브구조물의 누설을 포함한 진공 펌프 용량에 관한 연구)

  • Nam, Seong-Won
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.1157-1161
    • /
    • 2011
  • Parametric study has been conducted to calculate the capacity of vacuum pump system that will be used to maintain the pressure of the tube system under atmosphere level. Recently many railroad researchers pay attention to the tube train system as one of the super high speed transportation system. To achieve the ultra super high speed, the inside of tube system should be maintained the low pressure level. In the low pressure environment, it is well known that air resistance of train is drastically decreased. Vacuum pump system will be used to make the low pressure level of tube system, exhaust the leakage air and supplement additional vacuum pumping. Qualitative and quantitative study has been conducted to review the effects of major parameters concerned with the capacity of vacuum pump system. As a results of these studies, we get the lump capacity of vacuum pump for various parameters. These results can be used to analyse the effects of the reduction of air resistance.

  • PDF