地铁轨行区双向排烟方式数值模拟研究

针对轨行区列车火灾的烟气控制问题,提出了一种利用隧道风机进行双向排烟的方式。根据典型屏蔽门制式地铁车站结构建立无轨顶风道的车站三维模型,采用数值模拟方法对该排烟方式下的烟气扩散规律进行研究,分析了不同排烟量下站台人员高度处烟气温度、CO浓度以及能见度的分布情况,给出了不同车站隧道横截面积下满足人员安全疏散条件时的隧道口最小排烟量。

Numerical Analysis on Bilateral Smoke Exhaustin Metro Track Area

Aiming at the problem of smoke control , a bilateral smoke exhaust method for tunnel ventilation fan is purposed. Establish the three-dimensional model of the metro station with no OTE system according to the structure of typical underground railway station with PSD. Study the smoke diffusion law by means of numerical simulation method, analysis the distribution of temperature, CO concentration and visibility at the height of the people at different tunnel outlets, give the design minimum smoke emission of the tunnel opening to meet the safety evacuation conditions of different station tunnels.