Abstract:

The experiments of transformer oil pool fire in circular pans with a diameter of 20 cm to 50 cm were conducted. The combustion characteristics such as flame shape, burning rate and flame temperature were measured and studied. The results showed that the combustion process of transformer oil can be divided into three stages, the duration of stable combustion stage is the longest, and the extinction stage is obviously shorter than initial combustion stage. In terms of burning rate, larger diameter of transformer oil pool fire would cause the faster burning rate, shorter combustion time, and faster drop of level height.The burning rate per unit area is in good consistence with classical radiation model. The burning rate and the pool diameter present a power function. In terms of flame temperature, the flame temperature is decreasing gradually from bottom to top,and the maximum value is about 700~800 ℃. The scale has little effect on the maximum temperature.

Key words: transformer oil, oil pool fire, burning rate, flame temperature, flame height