青藏线空调列车室内气流组织的沿线变化数值分析  

Numerical study of airflow distribution in air-conditioned train in Qinghai-Tibet Railway

作　　者：王烨[1,2] 徐燃[2] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070 [2]兰州交通大学铁道车辆热工教育部重点实验室,兰州730070

出　　处：《重庆大学学报（自然科学版）》2014年第9期59-67,共9页Journal of Chongqing University

基　　金：国家自然科学基金项目(51266004;51476073);甘肃省自然科学基金项目(1308RJZA151);甘肃省高校基本科研业务费项目(212094)

摘　　要：以青藏线25T型空调列车为研究对象,为获得运行过程中车外环境对车内气流组织的影响特征,采用湍流Realizable k-ε模型对列车途经各主要站点时车内流场和温度场进行了数值分析。结果表明:太阳辐射对车内温度场的影响显著,送风参数随车外环境参数的变化而变化的空调模式对于确保高原列车室内舒适性意义重大。不同送风工况下的车内温度场和速度场之间的耦合作用导致车内不同位置的舒适性有所差别。同时,讨论了不同车外环境条件下各送风工况之间的转换问题,对现有空调系统的功能改进提出了更高的要求。To obtain the influence of outer environmental condition on the indoor airflow distribution for the 25T air-conditioned train in Qinghai-Tibet, the Realizable k-ε model is adopted to numerically analyze the indoor temperature and velocity fields of the running train. The results indicate that solar radiation has great effect on the indoor temperature field and it is meaningful for improving the thermal comfort to adjust the air supply parameters with the outer environmental condition. Under different air supply conditions, it is the conjugating relation between the indoor temperature field and velocity field that leads to different thermal comfort in different regions of the running train. In addition, the operating modes exchange under different outdoor environmental conditions is also discussed and some additional functions of the using air- conditioning system are put forward too.

关 键 词：青藏铁路 空调列车 太阳辐射 舒适性 

分 类 号：U270.38[机械工程—车辆工程]