阴角夹角构型对聚氨酯保温材料火蔓延影响试验探究  

Experimental study on the influence of internal angle configuration on fire spread of polyurethane insulation material

作　　者：李一波 万露露 Li Yibo;Wan Lulu(Hefei Fire and Rescue Division,Anhui Hefei 230094,China;School of Civil Engineering,Anhui Jianzhu University,Anhui Hefei 230601,China)

机构地区：[1]合肥市消防救援支队,安徽合肥230094 [2]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《消防科学与技术》2022年第10期1401-1404,共4页Fire Science and Technology

基　　金：安徽省高校协同创新项目(GXXT-2020-079);安徽省高校协同创新项目(GTXXT-2019-027);安徽建筑大学结余经费资助项目(JZ202112);安徽建筑大学博士后科技项目(2021kj04)。

摘　　要：通过开展小尺寸试验研究,分析了阴角夹角构型对聚氨酯保温材料向下火蔓延特性的影响,分析不同夹角构型对聚氨酯保温材料火蔓延典型特征参数的影响,主要包括火焰形态、质量损失速率、近域场温度和火蔓延速率。研究结果表明:在边墙的约束条件下,阴角夹角为30°时试样的燃烧程度明显大于150°;对于阴角夹角构型形成的受限空间,小角度夹角构型下聚氨酯试样燃烧程度大于较大夹角构型;受侧边墙体限制效应的影响,聚氨酯保温材料火蔓延过程中质量损失率和火蔓延速率均随阴角夹角的增大呈先减小后增大的趋势;由于烟囱效应的拉伸作用,火蔓延会形成两个温度峰值,且第一个温度峰值大于第二个温度峰值。The influence of internal angle configuration on downward fire spread characteristics of polyurethane insulation material(FPU) is analyzed by small-scale experimental research,and the influence of different angle configurations on typical characteristic parameters of fire spread of FPU insulation material is studied and discussed, including flame shape, mass loss rate, near-field temperature and fire spread rate. The results show that, under the constraint condition of the side wall, the burning degree of the sample when the angle is 30° is obviously higher than that of 150°;For the confined space formed by the internal angle configuration, the burning degree of FPU sample under the small angle configuration is greater than that under the large angle configuration. Influenced by the limiting effect of the side wall, the mass loss rate and fire spreading rate of FPU both decrease at first and then increase with the increase of the included angle. Due to the stretching effect of stack effect,there are two temperature peaks, and the first temperature peak is higher than the second.

关 键 词：阴角夹角构型 聚氨酯保温材料 火蔓延 烟囱效应 

分 类 号：X932[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]