School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, China.
Department of Public Administration, School of Law, Nanjing Tech University, Nanjing, 211816, China.
Environ Sci Pollut Res Int. 2022 Sep;29(43):65407-65422. doi: 10.1007/s11356-022-20465-x. Epub 2022 Apr 29.
This study investigates the effects of the passenger blockage on the smoke flow properties in the subway station fires. A series of numerical simulations was conducted in a full-scale subway station model under different smoke exhaust volumes (24-96 m/s) and passenger blockage scenarios. The parameter uncertainty and the model uncertainty were fully analyzed. Results demonstrate that the optimal smoke exhaust volume is 96 m/s when there is no passenger blockage. When the passenger blockage exists, its effects on the smoke exhaust efficiency, the smoke layer height, and the temperature profile beneath the ceiling are significant. The optimal smoke exhaust volume can only guarantee the passenger's safe evacuation in the blockage scenarios with the low passenger blockage level. For the high passenger blockage level, some measures should be taken to reduce the harm to the passengers near the fire source.
本研究调查了乘客堵塞对地铁站火灾中烟雾流动特性的影响。在不同的排烟量（24-96m/s）和乘客堵塞场景下，对全尺寸地铁站模型进行了一系列数值模拟。充分分析了参数不确定性和模型不确定性。结果表明，在无乘客堵塞的情况下，最佳排烟量为 96m/s。当存在乘客堵塞时，其对排烟效率、烟雾层高度和天花板下温度分布的影响显著。在低乘客堵塞水平的堵塞场景中，最佳排烟量只能保证乘客的安全疏散。对于高乘客堵塞水平，应采取一些措施来减少火源附近乘客的伤害。
