Abstract: Jet fuel and n-heptane were selected as fuels, a series of experiments were carried out with different oil pan diameters，and the typical characteristic parameters such as the burning rate, the heat release rate and the centerline temperatures of the fire plume were recorded and analysed. The results show that: The entire combustion process of jet fuel and n- heptane are roughly divided into three stages:the initial combustion stage, the stable combustion stage, and the attenuation extinguishment stage. The heat release rate of n- heptane is higher and the combustion time is shorter than that of jet fuel under the same conditions. There is a certain exponential relationship between the peak heat release rate and the oil pan diameter, which can be used to predict the maximum heat release rate of pool fire under the low pressure environment. A certain exponential relationship exists between the temperature rise in the center of the fire plume and the height and power of the fire source. The ideal fire plume model is modified and applied to Kangding high-plateau airport with a correction coefficient of 8.43.

Key words: high-plateau airport, low pressure environment, oil pool fire, heat release rate