铁道科学与工程学报2025，Vol.22Issue(5)：1923-1935,13.DOI:10.19713/j.cnki.43-1423/u.T20241097
升力翼对400 km/h高速列车明线交会气动特性影响研究
Influence of lift airfoils on aerodynamic performances of 400 km/h high-speed trains passing by each other in open air
摘要
Abstract
The installation of lift airfoils changes the inherent aerodynamic shape of high-speed trains.When two high-speed trains passing by each other in the open air,the flow field excitation induced by the lift airfoils will change the flow field structure around the high-speed trains in this process.To investigate the aerodynamic characteristics of high-speed trains with lift airfoils when passing by each other in the open air,and to figure out the impact that the lift airfoils have on the safety and smoothness of the high-speed trains during the meeting in the open air,this paper employed a compressible three-dimensional Navier-Stokes equations,Realizable k-ε two equation turbulence model and sliding grid technology to simulate the constant speed intersection of high-speed trains equipped with and without lift airfoils at a speed of 400 km/h.During this procedure,modifications in staggered pressure waves and aerodynamic forces were compared and analyzed.Research findings have suggested that that the installation of lift airfoils on high-speed trains does not alter the time history of surface pressure waves as they pass by each other in the open air,but the time history curve of surface pressure waves during such a procedure will be shifted upwards as a whole.In the vertical direction of the non-intersecting side,when the height is greater than 0.5 times the height of the train,the amplitude of the spatial intersecting pressure wave of the train begins to increase,and after the height exceeds the height of the train,it begins to decrease.However,the amplitude of the train with lift airfoils is always greater than that of the prototype high-speed train,and the installation of the lift airfoils will not change the positive peak value of the intersecting pressure wave.In the transverse direction of the non-intersecting side,the trend and magnitude of the spatial pressure waves on the non-intersecting side of the high-speed trains are essentially the same regardless of the presence or absence of the lift airfoils,and all decrease with increasing distance from the centerline of the train.The lifted airfoils will alter the temporal variation pattern of the lateral force of the high-speed trains as the trains pass by each other,causing the lateral force of the trains to always point towards the non-intersecting side during the crossing and exacerbating the fluctuations of the lateral force.It takes a longer time to restore the stability of lateral force after the end of the meeting.The results can provide a reliable theoretical guarantee for the development and design of the subsequent lift airfoils high-speed trains system.关键词
高速列车/空气动力学/升力翼/气动特性/明线交会Key words
high-speed train/aerodynamics/lift airfoil/aerodynamic performances/passing by each other in open air分类
交通运输引用本文复制引用
熊小慧,袁昊,陈光,程凡..升力翼对400 km/h高速列车明线交会气动特性影响研究[J].铁道科学与工程学报,2025,22(5):1923-1935,13.基金项目
国家重点研发计划资助项目(2020YFA0710903) （2020YFA0710903）
