中文摘要：

利用FDS软件建立模型,设置不同的火灾场景,研究风速对高层建筑火灾污染物下风向扩散的影响规律.实验测定了不同场景中烟气扩散、能见度、温度以及烟气运动速度的变化情况.结果表明,风速小于临界速度（临界速度约为10m/s）时,对下风向建筑的影响较小;风速大于临界速度,随着风速的增大,烟气接近下风向墙面并沿着下风向建筑墙面向下运动,下风向建筑附近能见度降低,温度未见变化。

英文摘要：

The influence of wind speed on smoke dispersion in the downwind of high-rise building fire sources was investigated by using the Fire Dynamics Simulator （FDS）. The smoke field, the visibility and the temperature on different fire scences were measured. The results showed that the impact of wind velocity on the downwind building was moderate when the speed was less than the critical value （about 10 m/s）. The smoke moved down along the surface of the building wall at the downwind when the speed was larger than the critical value. The temperature nearly remained unchanged but the visibility decreased with the increase of the wind speed.