夏季最热月铁路隧道内空气温度预测用外界计算温度的选择
Selection of outside design temperature for predicting temperature inside railway tunnel in the hottest month in summer
摘要：
以特长单线隧道为研究对象，建立了隧道内空气温度计算模型，采用有限体积法对方程进行离散，用MATLAB工具编写隧道内空气温度模拟计算程序。分别对采用建筑物夏季通风计算温度ODT、近20年每年最热月月平均温度的平均值ATH及逐时典型气温OHT 3种不同外界计算温度时夏季最热月隧道内的空气温度进行了模拟计算，得到了隧道内空气温度的分布规律及最高空气温度的变化规律。结果表明，选取ATH作为计算参数，可较准确地预测夏季最热月隧道内空气温度的最高值。
Abstract：
Taking the long single track tunnel as a study object, establishes a calculation model of air temperature in the tunnel, discretizes the equations by the finite volume method, and developes a simulation program for air temperature in tunnel with MATLAB. Calculates the air temperature in the tunnel in the hottest month in summer by numerical simulation respectively with three different outside design temperatures, including the outdoor design temperature for summer ventilation (ODT), the average of monthly average temperature in the hottest months in recent 20 years (ATH) and the outside hourly typical temperature (OHT), and obtains the patterns of the air temperature distribution and the highest temperature change in the tunnel. The results show that if the ATH is adopted, the highest air temperature in the tunnel can be predicted more accurately.
Keywords:tunnel,hottestmonthinsummer,airtemperature,outsidedesigntemperature,highesttemperature,ATH,ODT,OHT