摘要
采用大涡模拟的方法,研究了不同火源大小时,环境风速对双层玻璃幕墙空腔内烟气流动以及温度和速度分布的影响。研究结果表明,环境风会导致空腔下部开口进风量的增大,从而扰乱空腔内的烟气流动,同时也会对空腔内烟气起到冷却作用;另一方面环境风会导致上部排烟口排烟量的减小,导致烟气在空腔内聚集。同时发现,对于不同热释放速率的火灾,环境风对空腔内烟气温度分布造成的影响效果不同。
The effects of environment wind on fire smoke movement, temperature distribution and velocity distribution in the cavity of double-skin facade are investigated by Large Eddy Simulation （LES）. Results indicate that the wind enlarges the inflow air through the bottom vent, which would disturb the steady smoke in the cavity as well as cooling the cavity ;mean-while the wind decreases the fire smoke flowed out of the top vent and so it will bring out the gathering of fire smoke in the cavity. It’s also found that, the effect of the environment wind on the temperature in cavity is different for the different heat release rate （HRR） of fire.
出处
《工业安全与环保》
北大核心
2014年第12期41-44,共4页
Industrial Safety and Environmental Protection
