Reasonable Figure of Subsonic Train Front and Rear in Evacuated Tube Transportation Based on Aerodynamics Consideration
Based on hypothesis of incompressible viscous flow,2D stable flow field and moving tube wall conditions,as well as Navier-Stokes equation and k-e two-equation turbulent models,the aerodynamic drag imposed on the trains with different front/rear shapes which run at subsonic speed in evacuated tubes were calculated respectively.By analyzing the calculating results,it could be found that the streamlined train front/rear are effective for reducing aerodynamic drag acted on ETT trains running at subsonic speed and in partial vacuum tube from 101.25~10132.5Pa,and it is apparently more effective for reducing aerodynamic drag acted on trains in the tube to attach both taper front and rear than only taper front.The optimized taper length of the ETT train front/rear is 1.5~2 times of the train body section diameter.In addition,pointed out that a vertically symmetric taper is right for the ETT train front/rear.
Subsonic train Taper Front Evacuated Tube Transportation Partial vacuum Aerodynamics drag
Yaoping ZHANG Jun ZHU Baigang MI Maoxing SHEN
Institute of Evacuated Tube Transportation,Xijing University,Xian 710123,China School of Aeronautics,Northwestern Polytechnical University,Xian 710072,China
国际会议
沈阳
英文
734-739
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）