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| 都市快轨列车圆形与矩形隧道运行气动特性数值分析 | |
| 引用本文： | 王东屏,徐光平,李明,兆文忠.都市快轨列车圆形与矩形隧道运行气动特性数值分析[J].大连交通大学学报,2012,33(3):1-5. |
| 作者姓名： | 王东屏 徐光平 李明 兆文忠 |
| 作者单位： | 1. 大连交通大学机械工程学院,辽宁大连,116028 2. 唐山轨道客车有限责任公司产品技术研究中心,河北唐山,063035 3. 大连交通大学交通运输工程学院,辽宁大连,116028 |
| 基金项目： | 国际科技合作计划资助项目 |
| 摘 要： | 基于连续性方程Reynolds时均Navier-Stokes方程以及RNG k-ε湍动能模型方程对都市快轨列车隧道运行的空气动力流场进行数值计算.研究在以160 km/h隧道运行速度分别通过圆形和矩形隧道的工况下,从列车进入隧道直至整车完全驶出隧道的空气阻力以及车体表面压力变化情况,并对圆形及矩形隧道流场特性进行对比.计算结果表明:列车在矩形隧道和圆形隧道运行过程中的最大阻力分别达到15 458.5 N和13 829.3 N,最大表面压力分别达到4252.3 Pa和3 815.8 Pa.在两种隧道中运行的列车阻力变化规律及列车表面压力变化规律相同,矩形隧道运行时列车的最大阻力与圆形隧道相比增加了14.3％,表面最大压力增加了l3.8％. |
| 关 键 词： | 都市快轨列车 隧道 数值仿真 气动阻力 |
Numerical Study of Aerodynamic Characteristics for City Railway Train Running Through Circular and Rectangular Tunnels |
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| WANG Dong-ping , XU Guang-ping , LI Ming , ZHAO Wen-zhong.Numerical Study of Aerodynamic Characteristics for City Railway Train Running Through Circular and Rectangular Tunnels[J].Journal of Dalian Jiaotong University,2012,33(3):1-5. | |
| Authors: | WANG Dong-ping XU Guang-ping LI Ming ZHAO Wen-zhong |
| Institution: | 1.School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China;2.Technological Research Center of Product,Tangshan Railway Vehicle Limited Corporation,Tangshan 063035,China;3.School of Traffic and Transportation Engineering,Dalian Jiaotong University,Dalian 116028,China) |
| Abstract: | Based on continuity equation,Reynolds-Averaged Navier-Stokes equation,and RNG k-εturbulence model equation,the flow field of aerodynamics of the city railway train running through tunnels are used for digital simulation.The aerodynamic drag and the surface pressure variation are studied during the process of passing through circular and rectangular tunnels respectively at the speed of 160 km/h.In addition,the comparison of flow field characteristics is made between the two tunnels.The calculation result shows that the maximum drag of the train running in the rectangular and the circular tunnels is 15 458.5 N and 13 829.3 N respectively with maximum uniform surface pressure of 4 252.3 Pa and 3 815.8 Pa respectively.The maximum drag of the train running in rectangular tunnel increases by 14.3%,and the maximum surface pressure increases by 13.8% compared with running in circular tunnel. |
| Keywords: | city railway train tunnel numerical simulation aerodynamic drag |
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