Abstract: In order to study the smoke trace characteristics of corner fire in single room, this paper adopts one third size fire experiment to restore the corner fire in the room, measures the temperature of different points on the wall surface and the velocity of smoke spread, and studies the smoke trace characteristics when the fire source was in different positions. PyroSim is used to simulate the smoke spreading process. Results shows that, when the fire source is at the center of the room, a circle trace forms on the ceiling; when the fire source is at the corner, trace forms on both side wall and ceiling corner; the temperature and smoke spreading speed of the corner fire are higher than that of the fire at the center of the room; the experiment and simulation are consistent. The experiment conclusions can provide theoretical and experimental basis for the fire investigation of the corner fire.

Key words: corner fire, smoke trace, the spread of smoke; fire investigation