Computer Simulation Of Fire Smoke Flow In Underground Building With Large Space

The increasing of number of underground buildings (Subway station, Underground market) with large space brought a new challenge to the fire protection in recent years. There are lots of different between these type buildings with the other simple buildings and underground buildings just because of special structures in underground buildings with large space. It is necessary to simulate fire smokes of underground buildings with large space by computers due to existing procedures to fire smokes protections of undergrounds have many shortcomings.This paper's main point is researching the effects of fire's position and fire smokes protection system's settings on smokes flowing in underground buildings with large space. This paper also can be the reference to the design of smoke protection system and the fire evacuating underground buildings with large space.First, the characters and fire characters of underground buildings with large space and the actualities of researching smoke flow were introduced in this paper. The laws of smoke flowing and methods to researching these laws are introduced next. How to use the software FDS that had be used in this paper had be emphasized in this sector. Then a fire smoke in a subway station that can stand for underground buildings with large space had be simulated, and then got the laws of smokes flowing and to be the reference of evacuating subway station by analyzing simulation result. We find that the existing smoke protection settings can not control the smoke diffusing effetely at the same time. The general ability of smoke protection can be enhanced by enhancing the wind victory of vent-fan, installing smoke safety wall and smoke-alerter, and the purpose of evacuating and controlling can be achieved. In addition, the visual software was developed to create input file to avoid the troubles of existing method to create input data files.