通风对飞机客舱火灾烟气影响模拟

Simulation of the effect on fire smoke movement of ventilation in cabin

应用FDS图形化建模工具PyroSim建立仿真模型,模拟密闭飞机客舱火灾场景,通过对比经验公式和数值模拟结果,得到舱门关闭和开启两种场景下客舱内烟气扩散速度、能见度和温度的变化。仿真结果表明,客舱仿真能直观地显示舱内热流场分布及烟气蔓延情况;良好的通风状况可以提高能见度来保证人员疏散效率;通过客舱材料设计可以降低空间热释放速率。

Graphical modeling tool PyroSim from FDS was applied to simulate the aircraft cabin enclosed fire.Through the model test and experience formula contrast,the cabin smoke spread speed,visibility and temperature changes over time under two scenarios of cabin doors closed and cabin doors open were analyzed.Results showed that the cabin simulation can indicate the heat and smoke distribution in the cabin visually;good ventilation can improve the visibility so as to ensure the evacuation efficiency;cabin material design can lower the heat release rate.