【作者】 诸德志； 蒋军成；

【Author】 ZHU Dezhi1,2,JIANG Juncheng2 (1.Nanjing Fire Detachment,Nanjing,210008,China;2.Jiangsu Key Laboratory of Urban and Industrial Safety,School of Urban Construction and Safety Engineering,Nanjing University of Technology,Nanjing 210009,China)

【机构】 南京市消防支队； 南京工业大学城市建设与安全工程学院,江苏省城市与工业安全重点实验室；

【摘要】 采用CFD方法,运用κ-ε双方程模型,分别对岛式和侧式站台层轨道中央列车车厢着火时烟气扩散情况进行数值模拟,比较不同防排烟措施下的排烟效率。结果表明:排烟效率由低到高依次为排烟口与挡烟垂壁等高、排烟口与隧道轨道顶部等高、排烟口加倍;排烟口加倍使得岛式站台和侧式站台排烟效率分别提高8.3%和10%。因此合理设置挡烟垂壁高度和排烟口数量能提高排烟效率,使得站台层内烟气浓度和温度降低,为人员疏散创造有利条件。更多还原

【Abstract】 In subway station fires,the most immediate threat to passengers’ life is not the direct exposure to fire,but the smoke inhalation because it contains hot air and toxic gases,so it’s important to research the efficient smoke control model.Respectively,the fires were located on the carriages of the train on the island-platform layer and side-platform layer to simulate the smoke diffusion by CFD,effects of the different smoke control model have been compared.Comparing the results,the lowest efficiency of exhaust was the one which the exhaust fans were set on the same level of the hang wall,and then the one of exhaust fans setting on the top of the railway was better,the highest one,which the efficiency was raised up 8.3% and 10% in the island-platform and side-platform,was the exhaust fans doubling setting on the top of the railway.The reasonable set of the hang wall and the exhaust fans was the key to raise the efficiency of exhaust and make mass fraction and temperature of smoke depress.更多还原