线间距对600 km/h高速磁浮列车明线交会气动性能的影响  

Effect of line spacing on aerodynamic performance of open line rendezvous of 600 km/h maglev train

作　　者：杨鹏 杨明智[1] 张雷[1] 赵凡[2] 蔺童童 马江川 YANG Peng;YANG Mingzhi;ZHANG Lei;ZHAO Fan;LIN Tongtong;MA Jiangchuan(Key Laboratory of Traffic Safety on the Track of Ministry of Education,School of Traffic&Transportation,Engineering,Central South University,Changsha 410075,China;China Aerodynamics Research and Development Center,Computational Aerodynamics Institute,Mianyang 621000,China)

机构地区：[1]中南大学交通运输工程学院轨道交通安全教育部重点实验室,湖南长沙410075 [2]中国空气动力研究与发展中心计算空气动力研究所,四川绵阳621000

出　　处：《中南大学学报（自然科学版）》2023年第7期2952-2963,共12页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52002408);高性能复杂制造国家重点实验室自主研究课题(ZZYJKT2021-09);舰船综合电力技术国防科技重点实验室重点项目(614221720190203);中南大学校企联合创新项目(2022XQLH064)。

摘　　要：为探明不同线间距下600 km/h高速磁浮列车明线交会时的气动特性,基于三维、非定常、可压缩的N-S方程和SST k-ω湍流模型,采用重叠网格技术,分析列车明线交会时的车身周围流场结构、列车交会压力波和列车侧向力,通过动模型试验来验证数值模拟方法的准确性。研究结果表明:在不同线间距下,列车交会时的车身周围流场分布特征相似,随线间距增大,列车尾涡展向角逐渐增大,两交会侧车身之间流场的速度和压力不断减小;不同线间距下的列车压力波变化规律一致,压力波幅值与列车运行速度的二次方近似呈正比,当线间距由5.1 m分别增大至5.6 m和6.1 m时,压力波幅值分别减小28.2%和42.4%,且增大线间距对列车压力波正波缓解作用比负波的大,头波的缓解作用比尾波的大;列车交会过程中头车侧向力幅值比尾车和中间车的幅值大,增大线间距对尾车侧向力的缓解作用比头车和中间车的大,当线间距由5.1 m增大至6.1 m时,头车、中间车和尾车的侧向力幅值分别减小33.8%、34.1%和35.7%。To explore the aerodynamic characteristics of 600 km/h high-speed maglev trains at open line rendezvous with different line spacings,the flow field structure,pressure wave and aerodynamic force of train were analyzed by overlapping network technology with the open line intersection operation,based on threedimensional,unsteady and compressible N-S equation and SST k-ωturbulence model and the overlapping grid technology.And the accuracy of the numerical simulation method was verified by dynamic model test.The results show that the structure distribution characteristics of the flow field around the train body are similar with different line spacings in the process of train rendezvous.With the increase of line spacing,the span angle of the train wake vortex increases gradually,and the velocity and pressure values of the flow field between two train bodies at the intersection side decrease continuously.In addition,the pressure waves change similarly with different line spacings,and the amplitude of the pressure wave is approximately proportional to the square of the train speed.When the line spacing increases from 5.1 m to 5.6 m and 6.1 m,the pressure wave amplitude decreases by 28.2%and 42.4%,respectively.The positive wave relief effect of increasing line spacing is greater than that of the negative wave,and the effect of the head wave is greater than that of the tail wave.At last,in the process of train rendezvous,the amplitude of yawing force is greater than that of drag and lift,and the amplitude of the yawing force of the head car is greater than that of the middle car and the tail car.However,the increase of line spacing has more alleviating effect on the yawing force of the tail car than that of the head car and the middle car.When the line spacing increases from 5.1 m to 6.1 m,the yawing force amplitude of the head car,the middle car and the tail car decreases by 33.8%,34.1%and 35.7%,respectively.

关 键 词：高速磁浮列车 线间距 明线交会 流场结构 气动特性 

分 类 号：U266.4[机械工程—车辆工程]