地铁车辆多方位送回风系统研究

介绍了地铁车辆客室送风道的结构设计和安装方式,提出了地铁车辆客室多方位送回风系统的概念,采用计算流体力学方法对送风道内流场和客室流场进行数值模拟。研究结果表明,采用了多方位送回风系统后:送风道各出口预测风量与理论风量偏差在15%之内,出风均匀性良好;客室人员活动区域速度场与温度场分布均匀,微风速在0.20~0.42 m/s之间,断面垂直温差在3℃以内。地铁车辆采用多方位送回风系统,既提高了座椅区域与门区乘客的舒适性,又降低了客室中部的风速,缓解了乘客的吹风感。

Research on Multi-directional Air Supply and Return System for Metro Vehicles

In this paper,the structural design and installation mode of air supply duct for passenger rooms are briefly described and the concept of multi-directional air supply and return system for metro vehicles is put forward. A numerical simulation of flow field in air supply duct and indoor flow field is carried out by using computational fluid dynamics(CFD). The results show that after adopting the multi-directional air supply and return system,the deviation between the predicted air volume and the theoretical air volume at each outlet of the air supply channel is within 15%,and the uniformity of the air outputs is good. The velocity field and temperature field in the moving area of the carriages are evenly distributed,the breeze speed is between 0.2 m/s^0.42 m/s,and the vertical temperature difference of the section is less than3℃. The adoption of the multi-directional air supply and return system in metro vehicles not only improves the comfort of passengers in the seat and door areas,but also reduces the wind speed in the middle of the carriage and alleviates the blowing sense of passengers.