横滚姿态下飞机客舱火灾数值模拟研究

Numerical simulation of aircraft cabin fire in rolling attitude

为研究飞机不同横滚角度下客舱火灾发展规律,利用PyroSim搭建国产单通道客机客舱火灾模型,通过分析客舱烟气层高度、温度、CO体积分数变化,得到客舱及翼上出口处的可用疏散时间(ASET)。研究结果表明:影响客舱内部ASET的首要因素是温度,而影响翼上出口处ASET的则是CO;飞机横滚会导致客舱火灾高温区域由同侧壁向客舱前后两端蔓延,导致温度纵向影响跨度增大,但高温区域面积减小;横滚姿态下飞机翼上出口处温度上升时间延后,且最高温度降低;横滚角度增大会使翼上出口处ASET增加,但对前后舱门处影响不明显。研究结果可为航空器横滚姿态下的火灾疏散提供一定参考。

To investigate the development laws of cabin fire under different rolling angles of aircraft,a fire model of domestic single-channel airliner cabin was constructed using Pyrosim.By analyzing the variation in cabin smoke layer height,temperature,and CO volume fraction,the available safe egress time(ASET)at both the cabin and wing exit locations was determined.The results show that the primary factor influencing ASET inside the cabin is temperature,while CO significantly affects ASET at the wing exit.The aircraft rolling induces the spread of high-temperature regions within the cabin from the same side walls towards both front and rear ends,causing an increase in longitudinal influence span of temperature,but a decrease in the area of high-temperature region.Under the rolling attitude,the temperature rise time at the wing exit is delayed,and the peak temperature is reduced.Increasing rolling angle results in an increased ASET at the wing exit,but the impact on the front and rear cabin doors is less significant.The research results can provide certain reference for fire evacuation of aircraft in rolling attitude.