地铁列车车厢内不同气流形式下的舒适性

Thermal Comfort of Subway Train Compartment with Different Airflow Forms

针对地铁B型列车车厢,研究了车厢内温度场和速度场分布情况,并对现有回风口布置方式进行优化,采用Airpak软件建立车厢-人员-车厢内空气环境的气流流动、传热与传质三维耦合数学求解模型,进行数值模拟研究.结果表明:当回风口布置在侧顶板与侧墙板之间的连接处空气分布特性指标比回风口布置于车厢顶部时增大34.2%,比回风口均匀布置在车厢顶部中轴线上增大19.7%,能效利用率分别提高0.267和0.11.因此回风口布置在侧顶板与侧墙板之间的连接处,能很好地解决气流短路问题,改善车厢内的舒适性.

Aiming at the temperature and air velocity fields of a B-type subway train compartment,a three dimension physical and numerical model for flow,heat and mass transfer inside the compartment-people-compartment was developed by Airpak software,and simulations were conducted.The result show that when the air return is arranged at the joint between the side top plate and the side wall plate,the value of ADPI is 34.2%higher than the air return arranged at the top of the compartment,and 19.7%higher than the air return arranged at the central axis of the compartment.The value of energy efficiency is increased by 0.267 and 0.11 respectively.Thus,the blue print of air return arranged at the joint between the side top plate and the side wall plate can solve the problem of short circuit and improve the comfort in the subway train compartment.