地铁整流变压器室通风数值模拟

Numerical Simulation of the Ventilation in the Rectifier Transformer Room

目的针对地铁车站运行时变压器室内温度过高的问题,提出空调系统优化方案,以满足变压器安全运行的要求.方法利用商业流体计算软件FLUENT对地铁车站牵引变电所内整流变压器室的温度场和速度场进行数值模拟,得到整流变压器室内的温度和速度分布,并对各种工况的模拟结果进行比较分析.结果在变压器的上方有大量的热量,并形成热羽流,影响流场分布;变压器两侧的区域由于存在热阻,影响冷气流通过.结论通过改变风速,使变压器周围的气流组织更合理,以满足变压器正常工作的环境要求,并为今后的类似工程提供参考.

In order to solve the problem of that the temperature of the rectifier transformer was higer then the limit when the subway in operation state. The optimization scheme of air-conditioning system has be proposed. And then the demand of transformer security operating would be met.The temperature field and the velocity field in the rectifier transformer room of subway has been calculated by commercial software FLUENT and the distribution of temperature and velocity were obtained. The simulation results were analyzed through comparison in various conditions. The results showed that the thermal plume was drived by large quantity of thermal above the rectifier transformer could effected the distribution of flowfield; The passage of cold air has been effected by the thermal resistance in the areas on both sides of the rectifier transformer. The conclusion was that,a reasonable airflowform around the rectifier transformer could be acquired through changing the air speed which could met the demand of transformer security operating,and a reference would be provided for similar engineering.