分级真空管道交通系统气动能耗分析  

Aerodynamic energy analysis of multi-section evacuated tube system

作　　者：张子为 王英学[1] 孙浩程 古理全 任文强[1] ZHANG Ziwei;WANG Yingxue;SUN Haocheng;GU Liquan;REN Wenqiang(Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《空气动力学学报》2023年第7期112-119,I0002,共9页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(51778539)。

摘　　要：真空管道交通系统通过营造密闭低气压环境实现列车超高速节能运行。为了实现列车明线与真空管道运行的无缝连接,设计了分级真空管道交通系统,采用分隔门将管道系统分段,合理调整各管段内初始气压,列车通过管道系统过程中调整分隔门的开关使相邻段气体混合,实现列车常压与低压环境运行的合理过渡。参考理想气体功能理论,采用数值计算的方法分析管道-列车系统气动能耗,探讨分级真空管道参数对气动能耗的影响规律。结果表明:选取合理参数,系统降低的气动阻力能耗大于真空势能损失,可实现气动节能;当布置过渡管段、设计较大阻塞比、较长中间管段,系统气动节能效果较好。以气动节能效果为设计标准的分级真空管道交通系统参数设计体系,可为未来超高速运输发展,以及真空管道的设计和运营提供新的思路和参考。Evacuated tubes can realize the ultra-high-speed and energy-saving operation of trains by providing a closed low-pressure environment.This paper proposes a multi-section evacuated tube to obtain a smoother transition between the train's open-line and vacuum-running modes.The initial vacuum pressure in each section are different.When a train passes through the tube,the air in adjacent sections is mixed to fulfill the proper transition between regular-and low-pressure environments.Referring to work and energy theory of ideal gas,aerodynamic energy consumption is analyzed by numerical calculation method,with particular attention paid to tube parameters' influence on aerodynamic energy consumption.Results show that by selecting reasonable parameters,the reduction of the energy consumption induced by the aerodynamic drag surpasses the vacuum potential energy loss,indicating that the system can indeed reach an aerodynamic energy-saving state.In particular,the system achieves an impressive energy-saving performance when the tube is equipped with transition sections and a long large-blockage-ratio middle section.The multi-section evacuated tube system design method based on aerodynamic energy-saving criteria can hopefully provide new insights for developing ultra-high-speed trains as well as designing and operating evacuated tubes in the future.

关 键 词：分级真空管道 超高速列车 气动阻力能耗 真空势能损失 管道参数设计 

分 类 号：U292.914[交通运输工程—交通运输规划与管理]