横通管道参数对真空管道列车运行阻力的影响

Influence of Cross-Pass Piping Parameters on the Running Resistance of Vacuum Tube Trains

为了探究横通管道参数(横通管道长度、横通管道间隔、横截面积大小)对真空管道列车运行阻力的影响,本文在Fluent中对不同运行工况的列车进行数值模拟,通过数值模拟得到列车在带横通管道的真空管道交通系统运行时的运行阻力。结果显示,带有横通管道的真空管道列车的运行阻力与单真空管道列车的运行阻力相比大幅降低。随着横通管道长度的增加,列车运行阻力先降低后小幅度上升,管道长度达到8 m时再增加长度对列车运行阻力影响较小;随着横通管道间隔增加,列车运行阻力先增大后降低,间隔达到2.5倍车身长度时,列车受到的运行阻力小幅度波动;随着横通管道横截面直径由1.0 m增大到2.0 m,即横截面积由0.79 m^(2)增大到3.14 m^(2)时,列车运行阻力随着横截面积的增大近似线性下降。

In order to investigate the influence of cross-pass pipe parameters(cross-pass pipe length,crosspass pipe spacing,cross-sectional area size)on the running resistance of vacuum tube trains,this paper conducts numerical simulations in Fluent for trains with different running conditions and obtains the running resistance of trains running in vacuum tube transportation systems with cross-pass pipes through numerical simulations.The results show that the running resistance of a vacuum tube train with a cross-pipe is significantly reduced compared to that of a single vacuum tube train.As the length of the cross-pipe increases,the train running resistance first decreases and then rises slightly;when the length of the tube reaches 8 m,increasing the length again has less effect on the train running resistance;as the interval of the cross-pipe increases,the train running resistance first increases and then decreases,when the interval reaches 2.5 times the body length,the train running resistance fluctuates slightly;as the cross-sectional diameter increases from 1.0 m to 2.0 m,the cross-sectional area increases from 0.79 m^(2) to 3.14 m^(2),the train running resistance decreases approximately linearly with the increase of the cross-sectional area.