地铁车贯通道内空气流场与温度场的数值模拟

摘要

Subway train model with crowded passengers was established using k -ε turbulence model to simulate 3-D air-flow field and temperature distribution of subway gangway, considering the heat from human body and effect of heat transfer from each component to external temperature. The calculation result shows that the velocity-range is 0. 1 ~0. 3 m/s when the temperature is 22. 5℃. Comfort index of air flow rate and temperature of the gangway is assessed referred to EN14750 - 1 standard of European, which meets the design requirement.%建立地铁车车厢及贯通道的三维物理模型,内部乘客站立密集.使用k-ε标准湍流模型对地铁车车厢及贯通道处空气流场和温度场进行数值模拟,考虑了人体散热以及车体各组件对外部温度的传热作用.计算结果表明:贯通道内流场平均温度为22.5℃,气流组织速度范围约为0.1 ～0.3 m/s.参照欧洲EN14750 -1标准,贯通道内部空气流动速度及温度的热舒适性指标满足设计使用要求.