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利用计算流体力学(CFD)方法,对地铁岛式站台在不开启机械通风系统的情况下,单列车进站、停车及出站过程中流场和温度场分布进行了三维数值模拟。模拟结果量化了在列车通过的过程中,站台靠近轨道一侧所形成的较大风速和温升,以及这种影响在站台中部区域的衰减,现场实验说明了模拟结果具有可靠性。根据模拟结果,分析了列车运动过程所造成的活塞风以及列车散热对站台乘客候车环境的影响。采用的三维非稳态模拟方法,使得模拟更加接近于真实的物理过程,模拟结果对于地铁环控系统的设计具有指导意义。
By using computational fluid dynamics (CFD) method, the three-dimensional numerical simulation of flow field and temperature distribution in the process of stopping, stopping and leaving a single train is carried out on metro platform without opening the mechanical ventilation system. The simulation results quantify the larger wind speed and temperature rise of the platform near the track during the train passing, and the attenuation of this effect in the middle of the platform. Field experiments show the reliability of the simulation results. According to the simulation results, the influence of the piston wind caused by train movement and the heat dissipation of the train on the passenger waiting environment of the platform is analyzed. The three-dimensional unsteady simulation method adopted makes the simulation closer to the real physical process, and the simulation results are instructive for the design of the subway loop control system.