作者：陈春俊, 江传东, 刘逸

作者单位：西南交通大学机械工程学院, 四川 成都 610031

关键词：高速列车;隧道长度;CFD;换气系统;舒适性

摘要：

采用三维非稳态不可压缩雷诺时均N-S方程和可实现k-模型,在高速列车以350 km/h通过不同长度隧道时,对客室内流场的影响进行数值计算。构建列车车厢与空调管路系统的整体模型,并将太阳辐射、乘客散热对客室内流场的影响考虑在内。研究结果表明:当隧道超过一定长度时,新风口压力波动峰峰值随着隧道长度的增加呈明显下降趋势;客室内气压最大3 s变化率、最大1 s变化率以及峰峰值呈小幅下降趋势,空调换气系统中的压头风机能有效抑制外界压力波动,使车内压力变化很小;客室内温度变化范围在298~298.8 K之间,满足舒适性要求;新风口压力的波动有可能导致客室内风速变化,变化幅值均小于0.5 m/s,满足舒适性要求。

Study on air flow field of 350 km/h high-speed train crossing through tunnels

CHEN Chunjun, JIANG Chuandong, LIU Yi

School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract: The transient and incompressible 3D Navier-Stokes equation and realizable turbulent model were used for numerical calculation of the changes in air flow field as 350 km/h high-speed trains passed through different-length tunnels. An entire geometry model was built for the compartment and air-conditioning system of high-speed train in accordance with the effect of solar radiation and the heat caused by passengers upon the air flow field in the compartment. The results indicate that, when the tunnel exceeds a certain length, the peak to peak value of fresh air inlet pressure fluctuations show a clear downward trend as the tunnel is lengthened. The maximum change rate of the air pressure in the compartment in 3 s and 1s and the peak to peak value were slightly reduced. The air fan of the ventilation system can inhibit the external pressure wave to reduce the pressure change in the compartment. The range of temperature in the compartment is from 298 K to 298.8 K, which is comfortable. The fluctuation in fresh air inlet may change the wind speed inside the compartment and the magnitudes of change are less than 0.5 m/s, meeting the requirement for comfort.

Keywords: high-speed train;tunnel length;CFD;air-conditioning system;comfort

2015, 41(10): 85-89  收稿日期: 2015-03-27;收到修改稿日期: 2015-05-08

基金项目: 国家自然科学基金项目(51475387)

作者简介: 陈春俊(1967-),男,四川蒲江县人,教授,博导,研究方向为测控技术、列车空气动力学方向的研究。

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