酒店中庭自然排烟方式的数值模拟

分析青海某庭院式酒店中庭区域的烟气蔓延,通过模拟得到排烟口高度处烟气层内热流、质量流、体积流随时间变化的情况,分析建筑自然排烟系统的有效性,并对比排烟口布置位置对排烟效果的影响。通过计算得出排烟窗面积为内庭院面积的10%时能够保障建筑的消防安全。在4.0 MW的火源功率下,火源稳定之后150s左右烟气层稳定在30～32m高度处;自然排烟口位于庭院中心处的排烟效果优于排烟口位于四周。

Numerical simulation of natural smoke exhaust at atrium in hotel

The smoke flow of internal atrium in a garth-like hotel in Qinghai province under fire conditions was studied.The heat flux,the mass flow and the volume flow changes with time of different height in smoke layer were simulated to analyze efficiency of natural smoke exhaust system,then to analyze the effect to smoke exhaust efficiency by location of smoke vent.The atrium is safe when the area of exhaust window reaches the 10% of area of the yard when it is in fire.Under fire of 4MW,gas layer became stable in height of 30～32mat 150safter the smooth burning of fire,and the exhaust window in center is better than the windows at around.