动车组运行条件下客室内不均匀热环境分析

Analysis of non-uniform thermal environments in the carriage of EMU in running

动车组实际运行中,由于太阳辐射、外气温度等气象要素的影响使得客室内的热环境往往是不均匀的.借助于CFD软件模拟了运行条件下某动车组客室内的热环境,并根据ASHRAE相关标准分析评价了客室内热环境不均匀因素对乘客热舒适的影响.结果表明,夏季动车组客室内,对乘客热舒适产生主要影响的因素为太阳辐射以及局部吹风,不对称热辐射、垂直温差的影响较小.

Under the influence of solar radiation, temperature and the meteorological ele- ments concerned, thermal environments in the train carriage at a high running speed are une- ven. This paper simulates the EMU thermal environments inside the passenger compartment under running condition by the application of CFD. The influence of non-uniform thermal en- vironment factors on the thermal comfort of passengers is analyzed according to ASHRAE standards. The results show that thermal environments in the carriage of running train are uneven in summer. Main influence factors on passengers＇ thermal comfort are direct solar radiation as well as the draft. The influence of asymmetric thermal radiation and vertical air temperature difference is small.