摘要
既有高速铁路进一步提速受限,构建低真空管道运行超高速列车的发展趋势日益明显。运用滑移网格技术,建立动车组列车和低真空管道的三维耦合模型,考虑管道气体的瞬态压缩效应,分析低真空管道横截面积、动车组列车运行速度、管道环境温度和环境压力对车体表面压力的影响。研究表明,低真空管道横截面积、动车组列车运行速度、管道环境温度和环境压力不变时,测点的压力沿着车身长度方向基本不变;同一横断面测点的压力也基本相等。头车、中间车和尾车的车体表面压力幅值与列车运行速度的2.2次方成正比,与低真空管道横截面积成线性递减关系,与环境压力成线性递增关系,基本不受环境温度影响;列车运行速度越高,低真空管道横截面积越小,环境压力越大,列车运行时产生的车体表面压力波动幅值越大。
The speed increase of existing high-speed railway is limited,and the development trend of constructing low vacuum pipeline to run ultra-high-speed train is increasingly apparent.Using a three-dimensional,unsteady,compressible turbulence algorithm and slip grid technology,a coupling model of low vacuum pipeline and ultra-high-speed train is established to analyze the impact of train speed,vacuum pipeline vacuum,blockage ratio,and ambient temperature on the body surface pressure.Studies show that the measuring point pressure is basically unchanged along the length of the vehicle body,and is also basically unchanged at the same cross-section with the same train speed,the same low vacuum pipeline vacuum,cross-sectional area and temperature.The surface pressure amplitude of the head car,middle car and tail car is proportional to the 2.2 power of train speed,has a linear increasing relationship with blockage ratio,and has a linear increasing relationship with the environmental pressure of tube,which is basically not affected by temperature;The higher train speed,the higher the blockage ratio,and the higher environmental pressure of tube,the greater the amplitude of the pressure fluctuations on the surface of the car body when the train is running.
作者
黄尊地
常宁
HUANG Zun-Di;CHANG Ning(School of Rail Transportation,Wuyi University,Jiangmen 529020,China;School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2022年第2期376-383,共8页
Journal of Engineering Thermophysics
基金
国家重点研发计划项目“先进轨道交通”重点专项(No.2018YFB1201701-07)
广东省基础与应用基础研究联合基金—青年基金项目(No.2019A1515111052)
江门市基础与理论科学研究类科技计划项目(No.2020030100260005289)。
关键词
低真空管道
列车表面压力
运行速度
阻塞比
环境温度
环境压力
low vacuum tube
train surface pressure
speed
blockage ratio
environmental temperature
environmental pressure
