Experimental study on the descent distance of fire smoke at the corridor corner

Abstract

In this paper, a series of experimental studies were conducted in a L-shape scaled corridor to investigate the fire induced smoke descent behavior at the corridor corner. The effects of fire source location and fuel pool size on the smoke descent distance were studied. The variation of the thickness of smoke layer in the L-shaped corridor and the temperature attenuation under the ceiling were elucidated. Results showed that the smoke layer height decreased significantly at the corner. The descent distance increased with the increase of fuel pool size. The temperature of the incoming smoke decreased as the distance between the fire source and the corner increased, the Ri number of smoke layer also decreased. The effects of gas temperature, velocity and thickness on smoke settling distance were analyzed by experiments. A prediction model for the smoke descent distance at the corridor corner was proposed.