摘要
根据高速列车通过隧道过程中引起空气流动的特点,在对复杂空气流动现象进行合理简化的基础上,采用一维准稳定流动模型,建立了隧道截面突变处的边界条件,并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发展了截面突变隧道中单车压力波和会车压力波计算程序,通过国外试验结果验证了所建边界条件的正确性和合理性,为今后正确计算截面突变隧道对压力波的影响提供了可靠的理论依据.
According to the right predigestion on the characteristics of the air flow induced by the high-speea train entering through a tunnel, the boundary conditions with the abrupt changes in the cross-sectional area of the tunnel are proposed based on one dimensional quasi-steady flow model. These conditions are used to develop the numerical calculation procedure which uses the method of characteristics of generalized Riemann Variables and can calculate the pressure waves with abrupt changes in the condition of single train and trains crossing. And the good agreement comparing with foreign experimental results shows that the boundary conditions are correct. These boundary conditions will be of great value to further investigate the effect of abrupt changes in the cross-sectional area to pressure waves produced by high speed trains through tunnel.
出处
《兰州交通大学学报》
CAS
2008年第4期68-72,79,共6页
Journal of Lanzhou Jiaotong University
关键词
高速列车
隧道截面突变
隧道
压力波
边界条件
特征线法
high-speed train
abrupt changes in the cross-sectional area of a tunnel
tunnel
pressure wave
boundary conditions
method of characteristics
