Effect of oxygen-enriched on the combustion characteristics of cartons under high plateau

Abstract

Artificial oxygenation facilities are installed in the high altitude airport living areas, and the fire behaviors of solid materials will change significantly under low-pressure with oxygen-enriched. The influence law of pressure and oxygen concentration on solid combustion rate was deduced from the perspective of heat and mass transfer. Carton fire experiments were carried out in the self-designed low-pressure oxygen-enriched chamber to measure parameters such as mass combustion rate, flame morphology and flame temperature during the combustion process, with a view to providing some basis for indoor fire safety in high plateau airports. The results showed that the relationship between the rate of combustion of carton and the pressure and oxygen concentration is [see formula in PDF], and the empirical formula is obtained through experimental results. At 60 kPa, as the oxygen concentration increased from 21% to 33%, the heat release rate grew by 63.56%, the total heat production increased by 8%, and the maximum flame temperature increased by 19%. Furthermore, flame shape had a thin high type into a wide low type, the color had a blue-yellow gradually turned into a bright color. The inhibition of carton combustion by low pressure can be significantly weakened by oxygen enrichment and the fire hazard increases. In addition, pressure was weakly correlated with mass loss and heat production at high oxygen concentration.