运行速度对列车火灾温度分布影响的大涡模拟与分析

以某列车车厢实际尺寸为依据,采用美国NIST开发的大涡模拟软件FDS建立列车火灾模型,以列车运行速度为变量,进行列车火灾数值模拟与分析,重点分析了典型低速和典型高速时的温度场分布情况。结果表明,列车运行速度在120km/h以下时,车厢内的平均温度在240℃以下,最高温在车厢外表面;运行速度在120km/h以上时,列车速度越高,车厢内的平均温度越高。

The Large Eddy Simulation and Analysis on the Effect of Running Speed on Temperature Distribution of Train on Fire

With the actual dimensions of a certain train compartment as the basis,with the use of the large eddy simulation software FDS developed by the American NIST,the model of train on fire is set up,with the train operation speed as the variable,the digital simulation and analysis of train on fire are carried out,the temperature field distributions at typical low speed and typical high speed are mainly analyzed.The result shows that,when the train running speed is below 120 km/h and the average temperature inside compartment is below 240 ℃,the maximum temperature is at the outside surface of the compartment;when the running speed is above 120 km/h,the higher the train speed is,the higher the average temperature inside compartment will be.