基于方差分析法的中庭机械排烟影响因素

Variance analysis of influential factors on atrium mechanical exhaust system

通过数值模拟研究与方差分析相结合的方法,分析了火源功率、补风风速、排烟口数量和排烟口位置对中庭机械排烟效果影响的显著性.针对目前国内中庭,根据不同形状系数对中庭进行分类分析,讨论火源功率、补风风速、排烟口数量等不同因素对中庭机械排烟效果影响的显著程度.得出了不同形状系数的中庭机械排烟效果影响因素显著性的排序,其中火源功率对中庭内的温度影响最大,而补风风速对中庭底部温度的影响较大,排烟口数量和布置情况对中庭顶部温度影响大.中庭内烟气层的高度受补风风速和火源功率影响显著.

Using numerical simulation and variance analysis, the influences of the heat release rate, make-up air velocity, number of smoke vent, and smoke vent position on atrium mechanical exhaust system are analyzed. Dif- ferent shape factors cause different significant effect order. Heat release rate is the primary influential factor on temperature in atrium. Makeup air velocity has significant effect on temperature in bottom part of atrium. For the top of atrium, number of smoke vent and its position influence temperature obviously. Makeup air velocity and heat release rate have significant effect on smoke layer height in atrium.