机械科学与技术2025，Vol.44Issue(10)：1801-1809,9.DOI:10.13433/j.cnki.1003-8728.20230350
时速400km动车组最不利隧道交会气动效应分析
Analyzing Aerodynamic Effect of Rendezvous of EMU at Speed of 400 km/h in Most Disadvantageous Tunnel
摘要
Abstract
Based on the Reynolds time-averaged equation of three-dimensional,unsteady and compressible flow and the standard k-ε two-equation turbulence model,the transient pressure change of a two-speed 400 km electric multiple unit(EMU)train during the most unfavorable rendezvous in the center of a tunnel is studied with the sliding grid technique.The results show that with the increase of the longitudinal length of the train,the positive peak value and the peak to peak value of the transient pressure on the train surface decrease,while the negative peak value remains basically unchanged.When the tunnel wall pressure is in the range of 0 and 160 m from the tunnel entrance,the amplitude of the tunnel wall pressure increases slowly with the increase of the distance from the tunnel entrance but rapidly in the range of 160 m and 324.5 m and reaches the maximum 16 460.74 Pa at 324.5 m.Then it decreases rapidly in the range of 324.5 and 520 m but slowly to 3 740.33 Pa in the range of 520 m and 649.5 m.The maximum difference between the maximum and minimum values of pressure change is 340.1%.关键词
动车组/最不利隧道/瞬变压力/交会压力波Key words
electric multiple unit/most disadvantageous tunnel/transient pressure/rendezvous pressure wave分类
交通运输引用本文复制引用
杨斯涵,刘钊,刘峰,陈大伟..时速400km动车组最不利隧道交会气动效应分析[J].机械科学与技术,2025,44(10):1801-1809,9.基金项目
国家自然科学青年基金项目(52002265)、中国博士后科学基金项目(2022M712930)及山东省博士后创新项目(SDCX-ZG-202203079) （52002265）
