采用一维可压缩非定常不等熵流动模型和广义黎曼变量特征线法对时速300 km的CRH2G高速列车通过10 km特长隧道时诱发的压力波动进行数值模拟研究.考虑到高速铁路隧道断面及中隔墙开孔尺度的特点,采用薄壁孔口出流模型模拟隔墙开孔处的流动.与国外实验结果对比显示,本文数学模型及计算结果能有效模拟设置开孔中隔墙的铁路隧道内的压力波动.初步揭示了开孔面积、开孔间距及开孔方式等对列车及2列车对向通过时设置开孔中隔墙的隧道内压力波动及峰值的影响规律.本文研究方法和结果可为特长铁路隧道内中隔墙开孔设置方式提供数据支持.%A one-dimensional unsteady compressible non-homentropic flow model and the method of characteristics of generalized Riemann variables were used to study the pressure wave in a 10 km tunnel with perforated wall induced by a CRH2G with the speed of 300 km, or two CRH2G passing in reverse direction. Taking into account the characteristics of high-speed railway tunnel and the opening in the perforated wall, the thin plate orifice meter model was used. Compared with the results from experiments abroad, it is shown that the mathematical model and the results can accurately simulate the pressure fluctuation in the railway tunnel with perforated wall. The influence of opening area, spacing of the openings and opening pattern on the pressure wave and corresponding peak value in the tunnel were studied. The results can be used as a support for the setting of perforated wall in super long railway tunnel.
展开▼
