中文摘要：

基于大涡模拟（LES）方法获得烟气温度与速度,结合烟气在特殊长通道的结构特征,分析其温度分布规律与运动规律,发现温度边界层与速度边界层可以很好地表征烟气运动,顶棚下方0.015m处的烟气温度可以代替最高温度,与壁面对流传热的最高温度预测公式符合很好。

英文摘要：

The phenomena that the temperature and movenment of smoke thermal buoyancy-driven was studied by the large eddy simulation （LES） method. The discipline of temperature and movenment suffered from the effect that the obstructive effect of smoke screen in the unusual long steel channel sturcture was anaylzed. It was found that the charactar curve of temperature and velocity can represent the smoke feature, and the temperature below ceiling 0. 015 m can replace the maximum temperature con- form the common exponential relationship.