格栅类通透性吊顶对自动喷水灭火系统水量分布影响的实验研究

本文通过实验研究了自动喷水灭火系统在安装格栅类通透性吊顶后的水量分布特性。研究结果表明：格栅会严重改变自动洒水喷头的水量分布，其影响与喷头的安装高度和工作压力有关。当压力增加时，无格栅区域的水量增加明显大于有格栅的区域的水量增加。增大水压时，格栅对水量的分布的影响会减弱，当压力足够大时，能够接近无格栅时的灭火效率，可以保证自动喷水灭火系统在安装格栅吊顶后的灭火有效性。本文研究成果对实际工程应用具有指导意义。

Experimental Study of Grid Ceiling Effect on Fire Extinguishment Efficiency of Automatic Sprinkler

Automatic Sprinkler System (ASS) is a regular automatic fire extinguishing system generally used. In this paper, the distribution of water and the fire extinguishment efficiency of ASS were studied experimentally, when the grid ceiling was installed below the sprinkler head. The experimental results indicated: grid ceiling affects the water distribution significantly, related with installation height of sprinkler head and water pressure. When the water pressure is increased, water density increased more quickly in the area without grid ceiling than where with grid ceiling. The effect of grid ceiling can be reduced and the fire extinguishment efficiency can be improved by increasing the water pressure. When the pressure is high enough, the fire extinguishment efficiency will approach the efficiency without grid ceiling. The results can be used in practical project to keep the fire extinguishment efficiency of sprinklers when installed above grid ceiling.