摘要
本文采用CFD方法对某设有站台屏蔽门和活塞风井的地铁站中的自然通风系统进行了研究。文中建立了全尺寸几何模型,采用动网格方法模拟列车运行时引起的流域边界变化,通过求解三维非稳态雷诺时均N-S方程来获得地铁隧道、站台区域以及通风竖井中的流动特点。本文定义了2个参数,有效排风量Ne和有效进风量Ns,用来评价活塞风井的通风效率,主要分析了实际列车运营状况下,地铁站不同的风井数量、风井位置对活塞风井通风性能的影响。研究结果对于拟建地铁站的风井结构设计具有参考意义。
In this paper, a computational analysis on natural ventilation system in a subway station equipped with platform screen doors （PSDs） and vent shafts was carried out. Using the dynamic mesh method to simulate the moving boundary of the train, the train-induced unsteady flow in a full-scale geometry model was investigated by solving 3D Reynolds-average Navier-Stokes equations. Furthermore,two parameters of net exhaust air volume Ne and net suction air volume Ns were defined to evaluate the natural ventilation efficiency. Besides, the influences of the number and location of vent shafts on ventilation performance were discussed under the real train running schedules. To sum up,the results were useful for the structure design of new subway stations.
出处
《建筑科学》
北大核心
2012年第8期70-76,共7页
Building Science
关键词
地铁活塞风
活塞风井
通风性能
数值模拟
动网格
subway piston wind, vent shaft, ventilation performance, numerical simulation, dynamic mesh
