典型结构走廊火灾烟气流场的数值模拟研究

选取条形、L形、T形和环形走廊4种典型建筑结构为研究对象，使用火灾模拟软件FDS对4种典型结构的走廊发生火灾时的烟气流动规律进行了分析。初步得出建筑结构对于火灾烟气的流动和温度分布的影响:对于有封闭转角处的L形和环形走廊，转角处受到建筑封闭结构的阻碍和反浮力作用，热烟气易积聚;而无论何种形式的走廊，都会由于壁面限制和反浮力作用造成走廊末端热烟气的积聚;T形走廊交叉口处流通性较好，相对安全;这些容易造成烟气积聚的走廊转角和走廊末端的温度也会有所上升，而现在很多连接走廊的疏散楼梯都设置在走廊两端，反而不利于人员疏散。因此这些地方应引起重视，加强防火排烟措施。

Numerical simulation of fire smoke flow in typical structure of building corridor

Four kinds of building corridors with typical structure including the bar type, L type, T type and circular type were selected as the research objects, and the fire simulation software FDS was applied to analyze the smoke transportation laws in fire scenarios of the four types of corridors with typical structure. The influence of building structure on transportation and temperature distribution of fire smoke was obtained preliminarily. For L type and circular type corridors with closed corner, the hot smoke is easily to accumulate in the corner of corridor by the effect of blocking by closed structure and anti buoyancy. While for no matter what kinds of corridors, the hot smoke is easily to accumulate in the end of corridor by the effect of wall restriction and anti buoyancy. The intersection of T type corridor has a better circulation and is relatively safe. The temperature in the corner and end of corridor which are easy to cause smoke accumulation will also rise, while at present, the evacuation stairs of many connecting corridors have been set on both ends of the corridor, which is unfavourable for evacuation. So more importance should be attached in these places, and the fire prevention and smoke exhaust measures should be enhanced.