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Alternative TitleCFD simulation analysis on the aerodynamic drag characteristics of high-speed train running through tunnel
王一伟; 杨国伟; 黄晨光
Source Publication中国铁道科学/CHINA RAILWAY SCIENCE

基于可压缩流体的纳维—斯托克斯方程和RNG k-ε模型,以由头车、中间车和尾车3辆车编组的某高速列车1∶8风洞试验模型为研究对象,采用计算流体动力学软件(CFD),建立包括车体和走行部的三维非结构化列车表面离散网格模型和列车与隧道、列车与明线空间的组合计算网格模型,研究高速列车通过隧道时气动阻力的时变特性和规律.结果表明:高速列车在车尾刚进入隧道人口时其气动阻力达到最大值,为同样工况下明线运行时的2.5倍;高速列车完全进入隧道后,其气动阻力在一段时间内处于相对平稳期,为明线运行时的1.8倍;之后在隧道压力波的作用下,高速列车的气动阻力会发生准周期变化,变化幅度接近明线运行时的60%;在隧道长度大于高速列车长度的前提下,高速列车通过不同长度隧道时,其进入隧道时的气动阻力最大值均比较接近,而且在隧道内运行时的气动阻力变化特征和幅值也基本相同.

Other AbstractThe time-variation characteristics and mechanism of aerodynamic drags of the high-speed train when it runs through a tunnel are investigated, using the Computational Fluid Dynamics (CFD) software based on the Narvier-Stokes equations about compressible fluid and RNG k-Ε turbulence model. In the simulations, 3D combination meshes about the 1:8 wind-tunnel model of the three-car unit (head car, middle car and tail car) are constructed with the shape details of train bodies and bogies also considered. Results indicate that aerodynamic drag reaches its maximum value just when the tail of the train enters in the tunnel, which is 2.5 times for the condition that the train running in the open air. After the train fully accesses into the tunnel, the aerodynamic drag is stable in a period of time which is 1.8 times for the condition that the train running in the open air. Then the drag changes quasi-periodically by about 60% of the drag in the open-air condition. If the tunnel is longer than the train, the maximum drag, the characteristics and the amplitude of the changes of the drag are almost the same when the train runs through tunnels with different lengths.
Keyword高速列车 通过隧道 Aerodynamics 空气动力学 Computational Fluid Dynamics 气动阻力 Railroad Cars Aerodynamic Drag Railroad Transportation Railroads Three Dimensional Computer Graphics Turbulence Models - Cfd Simulations Characteristics And Mechanisms Compressible Fluids High Speed Trains Running-in Software-based Time Variations
Subject Area工业空气动力学
Indexed ByEI
Funding Organization国家科技支撑计划项目(2009BAG12A03);国家重点基础研究发展计划项目(2011CB71100)
Document Type期刊论文
Corresponding Author王一伟
Recommended Citation
GB/T 7714
王一伟,杨国伟,黄晨光. 高速列车通过隧道时气动阻力特性的CFD仿真分析[J]. 中国铁道科学/CHINA RAILWAY SCIENCE,2012,33(SUPPL.1):33-38.
APA 王一伟,杨国伟,&黄晨光.(2012).高速列车通过隧道时气动阻力特性的CFD仿真分析.中国铁道科学/CHINA RAILWAY SCIENCE,33(SUPPL.1),33-38.
MLA 王一伟,et al."高速列车通过隧道时气动阻力特性的CFD仿真分析".中国铁道科学/CHINA RAILWAY SCIENCE 33.SUPPL.1(2012):33-38.
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