摘要
在高速列车上安装升力翼可以为高速列车提供升力,降低列车对轨道的压力,从而有效减少轮轨磨损,但安装升力翼对列车在隧道内行驶时的气动性能产生较大影响,为此,基于三维非定常可压缩RNG k−ε两方程湍流模型,对升力翼列车通过隧道时的气动效应进行数值模拟研究。研究结果表明:在列车进入隧道过程中,升力翼尾流结构增大,对列车表面压力产生一定的影响;升力翼尾流使列车表面压力下降,同时升力翼增加车隧阻塞比,使列车表面的压力上升,两者共同影响列车表面压力,导致列车表面压力分布复杂;安装升力翼使列车表面与隧道壁面的压力幅值均增加,列车表面压力幅值最大增加5.4%,隧道壁面压力幅值最大增加14.1%;同时,对隧道出口的微气压波产生不利影响,在距离隧道出口20 m处的微气压波幅值上升4.1%。研究结果可为升力翼的参数优化设计提供指导。
Integrating wings with high-speed trains can alleviate the downward pressure exerted on the track,subsequently decrease wear and tear.However,wings seriously influence the aerodynamic performance of highspeed train when high-speed train passes through tunnels.RNG k−εequation turbulence model was employed to simulate the aerodynamic effects caused by high-speed trains with wings(HSTW)passing through tunnels.The results show that when the train enters the tunnel,the wing tail vortex field structure grows,which affects the train surface pressure.The wake of the wings decrease pressure on the train surface,while the wings increase the train/tunnel area ratio,which increases the pressure on the train surface.Both of them affect the pressure on the train surface,forming a complex pressure distribution on the train surface.The additional wings increase the pressure magnitude on both the train surface and the tunnel wall,with the maximum increase of 5.4%on train surface and 14.1%on tunnel wall.The wings also adversely affect the micro-pressure wave,and the amplitude of the micropressure wave at a distance of 20 m from the tunnel exit increases by 4.1%.The results can provide guidance for the design of wing parameters.
作者
王田天
黄大飞
王钰
王军彦
施方成
朱彦
张雷
WANG Tiantian;HUANG Dafei;WANG Yu;WANG Junyan;SHI Fangcheng;ZHU Yan;ZHANG Lei(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;CRRC Changchun Railway Vehicles Co.Ltd.,Changchun 130062,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第5期1702-1712,共11页
Journal of Central South University:Science and Technology
基金
国家重点研发计划项目(2020YFA0710903-C)
国家自然科学基金资助项目(52322215,52388102,52078199)
中国国家铁路集团有限公司项目(P2021J036)。
关键词
升力翼
高速列车
隧道
压力
微气压波
阻塞比
wing
high-speed train
tunnel
pressure
micro-pressure wave
blockage ratio
