高层建筑前室送风口大小对烟气控制数值模拟

The numerical simulation of pre-chamber air outlet sizes of high-rise building to flue gas control

针对不同正压送风口大小对高层建筑前室烟气控制效果的影响进行了分析,应用Fire Dynamic Simulation(FDS)场模拟软件对二道门关闭和半开状态下的不同的功率火灾进行模拟研究,研究结果表明,前室二道门半开情况下,在同一送风量下减小送风口截面积有利于提高正压送风防烟效果,随着火源功率的增加,送风口截面积的改变对烟气温度影响效果有限。

This paper analyzed the effect influence of different positive pressure air chamber sizes to high-rise building pre-chamber flue gas control.Application of FDS simulation software made simulation research on different power fire under two door closes and half open state,the results showed that,under pre-chamber two door half open circumstances,reducing air outlet section was beneficial to improve positive pressure air supply and smoke control effect in same air flow.With the increase of fire power,the influence was limited of air outlet section change to smoke temperature impact.