补风速度对中庭类建筑机械排烟效果的影响
Effect of make-up air velocity on mechanical smoke exhaust efficiency in buildings with atrium
摘要：
通过数值模拟计算，研究了补风速度对排烟效果的影响。结果表明，补风速度为7 m/s时，烟羽流倾斜比较严重；补风速度为5，3 m/s时，烟羽流倾斜程度较小；补风速度为1 m/s时，对烟羽流形状基本没有影响。补风速度为7，5，3 m/s时，烟气层高度下降较快；补风速度为1 m/s时，烟气层高度下降较慢。
关键词：中庭,机械排烟,补风速度,数值模拟
Abstract：
Performs a reasearch by numerical simulation. The results show that when the make-up air velocity is 7 m/s, the fire plume is seriously inclined; when the velocity is 5 m/s or 3 m/s, the fire plume is slightly inclined; and the velocity of 1 m/s has little influence on the fire plume; and that for the make-up air velocity of 7 m/s, 5 m/s, and 3 m/s, the smoke layer height descends faster; when the make-up air velocity is 1m/s, the smoke layer height descends relatively slower.
Keywords:atrium,mechanicalsmokeexhaust,make-upairvelocity,numericalsimulation