真空管道磁浮交通管内波系时空分布特征  

Characteristics of spatial and temporal distribution of wave system in evacuated tube maglev transportation

作　　者：胡啸 邓自刚[1,2] 张银龙[3] 张继旺[1] 张卫华[1,2] HU Xiao;DENG Zigang;ZHANG Yinlong;ZHANG Jiwang;ZHANG Weihua(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;Research Center for Super-High-Speed Evacuated Tube Maglev Transport,Southwest Jiaotong University,Chengdu 610031,China;China Railway Siyuan Survey and Design Group Co.,Ltd,Wuhan 430063,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]西南交通大学超高速真空管道磁浮交通研究中心,成都610031 [3]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《空气动力学学报》2022年第6期146-154,共9页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(52022086)。

摘　　要：为了避免列车直接起动带来的非物理现象,通过自定义程序和重叠网格技术分别控制列车速度和运动,基于IDDES湍流模型研究高温超导磁浮列车在加速启动阶段和匀速阶段的管内波系形成过程和传播特性,揭示了不对称模型下的波系时空分布特征。结果表明:列车加速向前运动,车前会不断产生压缩波,这一系列压缩波形成一道正激波。在匀速运行阶段,车前空间流场呈现准一维分布特性。尾流区较为复杂,存在着激波、膨胀波、涡对以及它们间的相互作用等复杂流动现象。在考虑悬浮间隙下,尾流区域的波系分布呈现明显的上下不对称性。由于反向旋转涡对的存在,不同高度水平面的尾流流场结构差异较大。在匀速运行阶段,扰动区长度均随着运行时间线性增加。To avoid the non-physical phenomena caused by the train’s direct start,the speed and motion of the train were controlled by a user-defined function and an overset mesh technique,respectively.Based on the IDDES turbulence model,the formation process and propagation characteristics of the wave system inside the tube of a high-temperature superconducting maglev train was studied under two operation phases,i.e.accelerating operation and uniform speed operation,revealing the spatial and temporal distribution characteristics of the wave system under the asymmetric model.The results show that,as the train accelerates forward,compression waves are continuously generated in front of the train,and eventually form a normal shock wave.During the uniform speed operation phase,the spatial flow field in front of the train presents the characteristic of a quasi one-dimensional distribution.The wake region is more complex,with the presence of complex flow phenomena such as shock waves,expansion waves,vortex pairs and their interactions.The wave system distribution in the wake region shows an asymmetry between the top and bottom when the suspension gap is considered.The wake flow structure varies considerably along the height due to the counter-rotating vortex pair.In the phase of uniform speed operation,there is a linear relationship between the length of the disturbed region and the running time.

关 键 词：真空管道 重叠网格 波系 时空分布 涡对 

分 类 号：U171[交通运输工程] TB79[一般工业技术—真空技术]