Abstract: Aiming at the fire safety of the super large square space, by experiment and simulation, the detail was researched with respect to temperature distribution, smoke deposition, oxygen concentration, etc. when a fire occurred in such a space. The research showed that, when fire occurred, the smoke had the phenomena like"stratification", "ceiling jet" and "wall jet". The temperature-distribution in the field had three gradients of high, medium and low, and the maximum and medium temperature would surpass the human tolerance in 300 seconds. The smoke would stay temporarily at a certain height from the ground during the descent. At the same time, after the smoke reaehed the ground, the combustibles will continue to burn in oxygencon centration of about 16%~18% for a long time, and the lowest oxygen concentration wouldn't appear near the fire source, but is most likely to occur at the bottom of the wall which is far away from the fire source.

Key words:

super large square space, fire experiment, fire simulation, temperature gradient, smoke descent; oxygen concentration