Abstract: Airbus A320 series aircraft is taken as the research object to explore the influence of low pressure on the smoke movement of fire. Using FDS numerical simulation, the law of smoke and temperature inside the cabin of the aircraft is analyzed. The results show that in a low-pressure environment, the fire heat release rate, temperature and CO concentration inside the aircraft cabin are reduced in varying degrees, and the peak end time is advanced. The smoke sinking speed and lateral spreading speed increase, but the smoke concentration decreases. It is inferred that the smoke generation rate has slowed down.

Key words: A320 cabin, low-pressure environment, fire, FDS numerical simulation, smoke movement, temperature field change