基于幅流风机的地铁列车乘员人体热舒适分析

Thermal Comfort Analysis of Subway Train Occupants Based on Disturbance-flow Fan

为研究幅流风机在地铁列车中对乘员人体热舒适影响.以应用新型幅流风机B型地铁车厢乘员为研究对象.采用数值模拟加载Stolwijk人体生理温度调节模型结合气流不舒适指标、Berkeley热舒适评价模型对车厢乘员人体热舒适进行研究.通过实验验证仿真模型准确性,分析了车厢空调送风温度为20℃时,加载幅流风机对乘员人体微环境和各指标的影响.并对比分析了不同频率扰动场函数工况乘员各指标差异.研究结果表明:幅流风机可提高车厢流场流速和均匀度,改善车厢内气流组织,优化人体微环境热流场.加载幅流风机后,乘员整体热感觉降低了7.3%、热舒适升高了0.76%.一定范围内,随着扰动频率的升高人体热舒适下降,最优扰动场函数频率为2.75次/min.

To study the influence of the disturbance-flow fan on the passengers'thermal comfort on the subway train,the new disturbance-flow fan type B subway car occupants was taken as the research object.The human body's physiological temperature regulation model with numerical simulation loading Stolwijk was used to study the cabin crew's human thermal comfort by combining the airflow discomfort index and Berkeley thermal comfort evaluation model.Experiments verified the accuracy of the simulation model.The influence of the loading disturbance-flow fan on the human body microenvironment and various indexes were analyzed when the air supply temperature of the air conditioner in the compartment was 20℃.The difference of occupant index in different frequency perturbation field was analyzed.The results show that the disturbance-flow fan can improve the flow velocity and uniformity and the air distribution in the compartment,and it can optimize the human microenvironment's heat flow field.After loading the disturbance-flow fan,the occupant's overall thermal sensation is decreased by 7.3%,and the thermal comfort is increased by 0.76%.Within a certain range,the human body's thermal comfort decreases as the disturbance frequency increases,and the optimal disturbance field function frequency is 2.75 times/min.