火灾的出现必然伴随着烟 ,而烟是火灾中窒息人生命最主要的因素 ,故在建筑物(尤其是高层和复杂建筑 )中应充分考虑消烟通风的功能。基于以上认识 ,近年来人们对此做了大量的试验研究工作。理论分析和试验模拟表明 :在一建筑物的空间内出现火灾时 ,将会出现一股热的瓦斯气流。这 The emergence of fire is bound to accompany the smoke, which is the most important factor in suffocating people in fires. Therefore, the functions of smoking and ventilating should be fully considered in buildings (especially in high-rise and complex buildings). Based on the above understanding, in recent years, people have done a lot of experimental research. Theoretical analysis and experimental simulations show that when a fire occurs in the space of a building, a hot gas stream will emerge. This