新建地铁隧道内活塞风温度变化理论分析

发布时间：2018-05-13 05:24

  本文选题：区间隧道 + 岩土层吸热　； 参考：《地下空间与工程学报》2014年04期

【摘要】：列车在地铁隧道中运行时,会产生大量的热,一部分被隧道内岩土层吸收,其它部分散失在空气中,随列车活塞风带入站台。本文假设在新建单线隧道,一列车行驶周期内,对隧道内活塞风温度变化规律进行理论分析。隧道内列车散热假设为移动热源,将隧道区间内的空气流动简化成一维管流,活塞风与隧道壁面发生对流换热,根据隧道内空气的热平衡,建立简单的流固耦合模型。简化后得到新建地铁区间隧道活塞风温度变化数学模型,并给出其数值计算方法,借鉴上海某地铁的参数,利用MATLAB软件计算并绘出整个过程中隧道内活塞风温度变化曲线,隧道内活塞风温度下降约1.9℃。分析发现隧道内的岩土层温度、隧道长度和列车速度等影响隧道内温度分布和温度变化幅度。
[Abstract]:When the train is running in the subway tunnel, it will produce a lot of heat, some of it will be absorbed by the rock and soil layer in the tunnel, the other part will be lost in the air and brought into the platform with the piston wind of the train. In this paper, it is assumed that in a new single-track tunnel, the variation of piston wind temperature in a new tunnel is theoretically analyzed during the running period of a train. The heat dissipation of the train in the tunnel is assumed to be a moving heat source, and the air flow in the tunnel section is simplified into a one-dimensional pipe flow. The piston wind and the tunnel wall are convection heat transfer. According to the heat balance of the air in the tunnel, a simple fluid-solid coupling model is established. After simplification, the mathematical model of piston wind temperature change in newly built subway tunnel is obtained, and its numerical calculation method is given. Using the parameters of a subway in Shanghai, the temperature change curve of piston wind in the whole tunnel is calculated and plotted by using MATLAB software. The piston air temperature in the tunnel decreases by about 1.9 鈩，

本文编号：1881854