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本文通过建立1∶2的中尺寸试验台,通过试验研究防火挑檐作用下建筑外立面开口火溢流行为特征,验证Lee Yee-Ping提出的建筑外立面无量纲温度模型适用于无防火挑檐下的本试验台。试验表明:对于通风控制的单室燃烧,燃烧室内平均温度主要取决于通风因子的大小;建筑外立面防火挑檐改变了窗口火溢流的轨迹,使窗口溢出的热烟气远离上层窗口,降低了上层窗口附近的温度,但同时增大了下层建筑和相邻建筑的火灾危险性。
In this paper, by establishing a 1: 2 medium-sized test bed, the fire overflow behavior of the facade of the building under the fire roof is verified through experiments. It is verified that the dimensionless temperature model of the building facade proposed by Lee Yee-ping is suitable for fire- Under the eaves of the test bed. The tests show that the average temperature of the combustion chamber mainly depends on the size of the ventilation factor for the ventilation-controlled single-chamber combustion. The fireproof eaves of the building facade change the trajectory of the window fire overflow so that the hot flue gas overflowing from the window leaves the upper window, Lower the temperature near the upper window, but at the same time increase the fire risk of the lower and adjacent buildings.