论文部分内容阅读
火羽流中心线温度是局部火灾作用下整个建筑中的最高温度,获得该处温度便可对结构的火灾安全性能进行初步评判。目前比较著名的羽流温度计算模型有Zukoski模型、Heskestad模型和McCaffrey模型,Zukoski模型和Heskestad模型因不适用于火焰区的温度计算而需要修正。为了验证各个模型的适用性,在室内外开展了功率为154.4、903.2kW的小型柴油油池火试验,并将试验结果与各计算模型的计算值进行对比。同时采用各模型分别对小功率、中功率和大功率火灾的羽流中心线温度进行计算对比,在对比分析的基础上给出了大空间建筑局部火灾羽流中心线温度计算公式。
The centerline temperature of fire plume is the highest temperature of the whole building under the effect of local fire, and the temperature of the place can be used to make a preliminary judgment on the fire safety performance of the structure. At present, Zukoski model, Heskestad model and McCaffrey model are well-known models of plume temperature calculation. Zukoski model and Heskestad model need to be corrected because they are not suitable for temperature calculation of flame zone. In order to verify the applicability of each model, a small-scale diesel fuel pool fire test with a power of 154.4 and 903.2kW was carried out indoors and outdoors, and the test results were compared with the calculated values of each calculation model. At the same time, the models were used to calculate and compare the plume centerline temperature of low, middle and high-power fire respectively. Based on the comparative analysis, the temperature calculation formula of local plume centerline was given.