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进行两组全尺寸大空间燃烧试验,验证数值模拟设计火的合理性。采用FDS模拟在火源功率恒定、建筑高度不同、建筑面积不同的火灾场景中,分析建筑高度对顶棚温度场的影响。结果发现,火源正上方顶棚处温度在建筑高度增加到9m后受高度的影响明显变小;火源中心线附近处的水平温度梯度变化非常明显,且随建筑高度的增加,变化梯度减小;距火源中心线较远处的温度变化梯度受建筑高度和面积的影响都非常有限。
Two full-size large-scale space combustion tests were carried out to verify the rationality of numerical simulation of fire design. FDS simulation was used to analyze the influence of building height on the roof temperature field in a fire scene with constant fire source power, different building height and different building area. The results show that the height of the ceiling above the fire source is significantly affected by the height when the building height is increased to 9m, and the horizontal temperature gradient near the center of the fire source is obviously changed. The gradient of the change decreases with the height of the building ; The gradient of temperature change farther away from the center line of the fire source is very limited by the height and the area of the building.