地铁隧道火灾自然排烟模式数值模拟研究
Numerical simulation on natural ventilation mode of smoke control in underground railway tunnel fire
摘要：
采用标准K-ε模型，结合某实际工程对地铁隧道区间发生火灾时的自然排烟模式进行了模拟计算，以预测其实际通风排烟效果。具体分析了不同通风竖井间距、通风竖井出口局部阻力系数变化和隧道区间是否设置隔墙等因素对区间内实际通风排烟效果的影响，最后给出了一些建设性的结论。
关键词：数值模拟,地铁隧道火灾,自然通风模式,K-ε两方程模型
Abstract：
Using the standard Kε turbulence model, simulates the natural ventilation mode of smoke control in underground railway tunnel fire with a project and predicts the smoke control efficiency. Analyses the effect of the space between ventilation shafts, local resistance coefficient of ventilation shaft and the existence of partition wall in tunnel on the smoke control efficiency, and obtains some constructive conclusions.
Keywords:numerical simulation, underground railway tunnel fire, natural ventilation mode, K-ε twoequation model