Abstract Based on the Navier-Stokes (N-S) equations of incompressible viscous fluids and the standard k-ε turbulence 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 1000 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 1000 Pa.
This work was 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. 50588201and 50872116); the Research Fund for the Doctoral Program of Higher Education of China (SRFDP200806130023); and the Fundamental Research Funds for the Central Universities (SWJTU-09BR152, SWJTU09ZT24, and SWJTU11CX073).
Cite this article:
Xuyong CHEN, Lifeng ZHAO, Jiaqing MA, Yuansen LIU.Aerodynamic simulation of evacuated tube maglev trains with different streamlined designs[J] JMT, 2012,V20(2): 115-120
Y.P. Zhang, S.Z. Mei, X.G. Zeng, ETT-lead the high-speed transportation of the 21st century, World Sci-Tech Research and Development, 2002, 24(2): 60-64.
D. Oster, ET3, http://www.et3.com, 2004-05-12.
D. Oster, Crystal River, Fla. Evacuated Tube Trans-portation, United States Patent: 5950543, 1999.
D. Oster, M. Kumada, Y.P. Zhang, Evacuated tube trans-port technologies (ET3)tm: a maximum value global transportation network for passengers and cargo, Journal of Modern Transportation, 2011, 19(3):42-50.
Y.P. Zhang, Y.Y. Li, Role and position of ETT in the future comprehensive transportation system, In: The Proceedings of International Conference on Transportation Engineering 2007, Chengdu, China, 2007: 2796-2803.
Q.H. Qian, Some issues on design of underground magnetic levitation transportation system, Tunnel Con-struction, 2011, 31(2): 155-160 (in Chinese).
Y.P. Zhang, D. Oster, M. Kumada, et al., Key vacuum technologies to be solved in evacuated tube transportation, Journal of Modern Transportation, 2011, 19(2): 110-113.
Z.Y. Shen, On developing high-speed evacuated tube transportation in China, Journal of Southwest Jiaotong University, 2005, 40(2): 133-137 (in Chinese).
X. Zhou, Y.P. Zhang, Y.F. Yao, Numerical simulation on the aerodynamic drag of high-speed train in evacuated tube, Science Technology and Engineering, 2008, 28(6): 1671-1819 (in Chinese).
X. Zhou, D.Y. Zhang, Y.P. Zhang, Numerical simulation of blockage rate and aerodynamic drag of high-speed train in evacuated tube transportation, Chinese Journal of Vacuum Science and Technology, 2008, 28(6): 535-538 (in Chinese).
Y.P. Zhang, Numerical simulation and analysis of aerodynamic drag on a subsonic train in evacuated tube transportation, Journal of Modern Transportation, 2012, 20(1): 42-50.
H.B. Kwon, K.H. Jang, Y.S. Kim, et al., Nose shape optimization of high-speed train for minimization of tunnel sonic boom, JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing, 2001, 44(3): 890-899.
J.S. Lee, J.H. Kim, Approximate optimization of high-speed train nose shape for reducing micropressure wave, Structur-al and Multidisciplinary Optimization, 2008, 35(1): 79-87.
J. Zhang, Research on optimum nose and tail shapes of foreign high-speed trains, Electric Drive for Locomotive, 2000, 35(2): 16-18 (in Chinese).
R.L. Chen, Q.Y. Zeng, J. Xiang, et al., Study on the performance of aerodynamics of high-speed train with different nose shapes, Journal of Hunan University of Science and Technology (Natural Science Edition), 2009, 24(1): 45-48 (in Chinese).
Y. Yan.[J].W.N. Fang, Analysis of head shape design of high-speed train, In: Proceedings of the 2006 International Conference on Industrial Design and the 11th China Industrial Design Annual Meeting, Hangzhou.2006,:-
J.R. Zhang, L. Zhou, Q.H. Sun, et al., Simulated calculation of distributing of air flow around metro train head and its design analysis, Railway Locomotive and Car, 2008, 28(2): 43-47 (in Chinese).
H.Q. Tian, D. Zhou, P. Xu, Aerodynamic performance and streamlined head shape of train, China Railway Science, 2006, 27(3): 47-55 (in Chinese).
S.G. Yao, P. Xu, Aerodynamic shape optimization of domestic maglev train, Railway Locomotive and Car, 2007, 27(3): 33-34, 69 (in Chinese).
H.Q. Tian, Train Aerodynamics, Beijing: China Railway Publishing House, 2007: 28-32 (in Chinese).