箱式水幕系统的流动分析及其在地下建筑中的应用

箱型水幕系统是用于地下建筑的消防系统之一，本介绍了水幕系统在地下建筑火灾中的应用，并采用计算流体力学（CFD）的方法，对箱体内部及水幕喷嘴处水流的流动状况进行了模拟计算，结果表明，箱体内存在复杂的旋涡结构，该旋涡结构对水幕喷嘴处的水流速度影响很大，喷嘴处流速的不均匀会导致水幕不均匀，从而影响水幕防火隔烟的效果。

WATER CURTAIN SYSTEM OF BOX TYPE AND ITS APPLICATION IN UNDERGROUND CONSTRUCTIONS

Water curtain system of box type is one of the important firefighting measures in the undergrounds. In the present paper the application of the water curtain system of box type in the underground construction is presented. It shows that the water curtain plays roles of fire protection, cooling, diluting, smoke barrier. It makes an easy passage for personal evacuation from underground constructions. In order to understand the flow pattern of the water curtain system of box type, the flow inside the box and at the muzzle of the water curtain is simulated with the computational fluid dynamics (CFD). The results show that there are many complex vortex structures within the box of the water curtain system. The vortex structures, especially the vortex structures between the two inlets, have the great effect on the velocity at the muzzle of the water curtain system. As far as the paper is concerned, the uneven velocity at the muzzle results in the uneven water curtain and affects the application of such a water curtain system in underground constructions.