室内火灾均一温度假设实验研究

Experimental researches on the homogeneous temperature assumption in compartment fires

通过小规模火灾实验,对多点温度进行统计分析。结果表明,在轰燃发生前和轰燃发生一段时间后,室内温度均一性较好,发生轰燃时,均一温度假设不成立。在此基础上提出温度分布均一性指数量化温度分布均一化程度,并认为其最小值对应的时间是轰燃发生时间。

By small scale fire experiments, temperature at several points was statistically analyzed. Results showed that before and after the flashover, the temperature in the room is homogeneous, but when there is flashover, the homogeneous temperature assumption doesn＇t hold. A homogeneity index was pro posed to quantify the homogeneity of indoor temperature, and it was believed that when the index takes the minimum, the flash-over happens.