【摘要】 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。更多还原

【Abstract】 A simplified subway station model is created and the air velocity and temperature distributions on subway island platform under natural ventilation mode during a single train entering,staying and departing processes are simulated by using Computational Fluid Dynamics(CFD) method.The simulation shows that owing to the train passing through the station,there is a great air velocity and temperature enhancement in the platform area near the track way.The piston influence on central area is significantly weakened and the temperature increase is also decreased.The field experimental results validate the simulation.On basis of the simulation,the influences of both the train’s piston effect and its heat emission on air environment in different parts of the platform are analyzed.The simulation is three dimensional and transient,so it could represent the real physical process better and the result should be beneficial to the air environment control system design.更多还原