Aerodynamic simulation of evacuated tube maglev trains with different streamlined designs  

作　　者：Xuyong CHEN Lifeng ZHAO Jiaqing MA Yuansen LIU 

机构地区：[1]Key Laboratory of Magnetic Levitation Technologies and Maglev Trains(Ministry of Education of China),Superconductivity and New Energy R&D Center,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Journal of Modern Transportation》2012年第2期115-120,共6页现代交通学报（英文版）

基　　金：supported by the Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT) of the Ministry of Education of China(IRT0751);the National High Technology Research and Development Program of China (863 program: 2007-AA03Z203);the National Natural Science Foundation of China (Grant Nos. 50588201 and 50872116);the Research Fund for the Doctoral Program of Higher Education of China (SRFDP200806130023);the Fundamental Research Funds for the Central Universities (SWJTU09BR152, SWJTU09ZT24, and SWJTU11CX073)

摘　　要：Based on the Navier-Stokes （N-S） equations of incompressible viscous fluids and the standard k-ε turbu- lence model with assumptions of steady state and two dimensional conditions, a simulation of the aerodynamic drag on a maglev train in an evacuated tube was made with ANSYS/FLOTRAN software under different vacuum pressures, blockage ratios, and shapes of train head and tail. The pressure flow fields of the evacuated tube maglev train under different vacuum pressures were analyzed, and then compared under the same blockage ratio condition. The results show that the environmental pressure of 1 000 Pa in the tube is the best to achieve the effect of aerodynamic drag reduction, and there are no obvious differences in the aerodynamic drag reduction among different streamline head shapes. Overall, the blunt-shape tail and the blockage ratio of 0.25 are more efficient for drag reduction of the train at the tube pressure of 1 000 Pa.Based on the Navier-Stokes （N-S） equations of incompressible viscous fluids and the standard k-ε turbu- lence model with assumptions of steady state and two dimensional conditions, a simulation of the aerodynamic drag on a maglev train in an evacuated tube was made with ANSYS/FLOTRAN software under different vacuum pressures, blockage ratios, and shapes of train head and tail. The pressure flow fields of the evacuated tube maglev train under different vacuum pressures were analyzed, and then compared under the same blockage ratio condition. The results show that the environmental pressure of 1 000 Pa in the tube is the best to achieve the effect of aerodynamic drag reduction, and there are no obvious differences in the aerodynamic drag reduction among different streamline head shapes. Overall, the blunt-shape tail and the blockage ratio of 0.25 are more efficient for drag reduction of the train at the tube pressure of 1 000 Pa.

关 键 词：aerodynamic drag evacuated tube maglev train blockage ratio train head and tail 

分 类 号：U292.917[交通运输工程—交通运输规划与管理] U461.1[交通运输工程—道路与铁道工程]