Numerical simulation of aircraft cabin fire in rolling attitude
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,tempera-ture,and CO volume fraction,the available safe egress time(ASET)at both the cabin and wing exit locations was deter-mined.The results show that the primary factor influencing ASET inside the cabin is temperature,while CO significantly af-fects 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 roll-ing attitude.
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