车站轨行区热环境的CFD模拟研究
CFD simulation on thermal environment in subway station tunnels
摘要：
提出了车站轨行区温度场的CFD模拟方法，通过实测验证了模拟方法的准确性。通过模拟可以准确得出列车停站时冷凝器的进风温度，从而可提前诊断列车空调器是否存在停机风险；还可以得出车站轨行区的温度分布情况，为改进排热系统设计提供参考。模拟发现：列车位于车站轨行区时，冷凝器的进风温度较隧道空气温度有所上升，且受到排热风机运行状况、车厢载客人数等不同因素的影响；当排热风机风量为30 m3/s时，开风机工况冷凝器平均进风温度比关风机工况低2.8 ℃。
Abstract：
This research proposes a CFD simulation method for the temperature field in subway station tunnels, and the simulation method is verified by field measurements. The simulation can predict the inlet air temperature of the condensers during the train stop, and help to diagnose the shutdown risk of train air conditioners in advance. In addition, the air temperature distribution obtained from the simulation can provide a reference for improving the design of the heat exhaust system. The simulation results show that when the train is located in the subway station tunnel, the inlet air temperature of the condenser will be higher than that of the tunnel, and it will be affected by different factors such as the operation status of the heat exhaust fan and the number of passengers. When the air volume of the heat exhaust fan is 30 m3/s, the average inlet air temperature of the condenser under the fan-operating condition is 2.8 ℃ lower than that under the fan-off condition.
Keywords:subway;tunnel;thermalenvironment;condenser;inletairtemperature;trainairconditioner;heatexhaustfan;CFD