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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, the CFD method is used to study the natural ventilation system in a metro station with platform screen door and piston air shaft. The full-scale geometric model was established in this paper. The moving grid method was used to simulate the changes of the river basin boundary caused by train operation. The flow characteristics in the subway tunnel, platform area and ventilation shaft were obtained by solving the three-dimensional unsteady Reynolds time-averaged N-S equation. In this paper, two parameters are defined, the effective exhaust volume Ne and the effective inlet air volume Ns, which are used to evaluate the ventilation efficiency of the piston air shaft. The main analysis of the actual train operating conditions, the number of different air shaft at the subway station, Ventilation Ventilation Performance. The research results have reference meaning for the design of the air shaft structure of the subway station.