不同羽流模型在封闭空间池火灾中的应用  

Application of different plume models for closed-space fire

作　　者：吴向君[1] 丁立斌[1] 孟峰 叶心华[3] 

机构地区：[1]海军工程大学动力工程学院 [2]上海训练基地 [3]91202部队

出　　处：《海军工程大学学报》2015年第2期95-98,共4页Journal of Naval University of Engineering

摘　　要：利用不同羽流模型对封闭空间火灾进行建模,在结合实验测出的热释放速率基础上,计算了不同羽流模型下的烟气填充时间和温度变化情况。将计算结果和实验数据进行了对比,分析了不同羽流模型的适用性。结果表明:火灾初期,4种羽流模型下的烟气填充速度相近,其中McCaffrey羽流模型与实际烟气填充过程最为接近;火灾后期,Zukoski羽流模型最接近实际烟气填充过程;火灾过程中,Thomas羽流模型和Zukoski模型计算结果非常接近,Thomas羽流模型更适用于一般的工程计算;4种羽流模型下的烟气层温度和实验结果有很大差异,实际工程中均不建议用来预测烟气温度。This paper refers to culates the smoke-filling time modelling the closed-space fire by and smoke temperature according using different plume models and cal- to the heat release rate measured in experiment. Theoretical calculations are compared with the experimental results to verify the practica- bility of different plume models. The results show that at an early stage of fire, the smoke-filling speeds of four plume models are similar, among which McCaffrey plume model is most close to practi- cal smoke-filling processes~ at a later stage of fire, Zukoski plume model is most close to practical processes; during the fire, the uses of Thomas plume model and Zukoski plume model leads to almost identical results; Thomas model is more suitable for engineering application. As there is a great difference between theoretical calculation and experimental data of smoke layer temperature, the theoreti- cal calculation method is not recommended for predicting smoke temperature in practical engineering.

关 键 词：区域模型 羽流模型 封闭空间火灾 烟气填充 烟气温度 

分 类 号：TU998.12[建筑科学—市政工程]