铁道科学与工程学报2018，Vol.15Issue(7)：1641-1649,9.DOI:10.19713/j.cnki.43-1423/u.2018.07.002
横风下普速客车与动车组在挡风墙后交会气动性能
Aerodynamic performances of common passenger train and EMU passing by each other under crosswind and wind-break wall
摘要
Abstract
On the basis of the three-dimensional unsteady incompressible N-S equation and the turbulence model of k-ε two equations, the sliding mesh method was adopted, and the aerodynamic performances of EMU passing by common passenger train under crosswind and wind-break walls were simulated. The results show that by contrasting the transient pressure on the train surface with numerical simulation is consistent with the results of full-scale experiment, the peak values of pressure wave shows agreeable accordance with the error under 10%. When trains passing by each other under crosswind, the crosswind makes the pressure zone of train had lateral movement. The lateral force and overturning moment increase with the increase of train speed, and when the speed of common passenger train increase from 100 km/h to 160 km/h, the peak values of overturning moment of common passenger train and EMU increase by 11.7% and 20.8%. When 3.5 m wind-break walls are set in line side, the lateral force of trains almost approach the minimum value in the four heights, and the lateral force acting on head car of common passenger train and EMU decrease by 85.7% and 45.4% compared with no wind-break wall, which means the aerodynamic performances of the two trains are obviously improved.关键词
普速客车/动车组/交会/横风/挡风墙/气动性能Key words
common passenger train/EMU/train-crossing/crosswind/wind-break wall/aerodynamic performances分类
交通工程引用本文复制引用
周志鹏,姚松,刘凯,梁玉..横风下普速客车与动车组在挡风墙后交会气动性能[J].铁道科学与工程学报,2018,15(7):1641-1649,9.基金项目
国家自然科学基金资助项目(U1534210) （U1534210）
中国铁路总公司科技研究开发计划资助项目(2014T001-A) （2014T001-A）
中南大学自主探索创新资助项目(2017zzts589) （2017zzts589）
