地下建筑的防火隔烟及箱式水幕流动分析

Smoke control in underground constructions and flow analysis of water curtain system of box type

地下建筑由于其地理位置的特殊性 ,极高的火灾发生率以及较大的火灾损失使得地下建筑中的消防系统举足轻重 ,防火排烟系统是其中的关键。在阐述地下建筑的防火隔烟方法的基础上 ,认为箱式水幕系统是较适用于地下建筑消防系统之一。采用计算流体力学方法对箱式水幕系统出水的流动状态进行模拟。算例分析显示 ,除小部分外水幕厚度沿高度基本不变 。

Because of special geography site of underground constructions, the higher taking place rate of fire and bigger fire loss make fire-fighting system prominent. Therefore the smoke control system is the key equipment. On the basis of expatiating on the way of smoke control of underground constructions, we think that water curtain system of box type is more applicable to underground constructions than the others. Moreover the flow of water curtain system of box type is simulated by using computational fluid dynamics. It showed that the water curtain thickness retain nearly same along height except for some small fractions and can come into being the continuous water curtain without break.