气流速率对软质聚氨酯泡沫阴燃及传播的影响  

Influence of air flow rates on smoldering and propagation of flexible polyurethane foam

作　　者：王胜 尤飞 周亚[1,2] 皇甫文豪 王振华[1,2] WANG Sheng;YOU Fei;ZHOU Ya;HUANGFU Wen-hao;WANG Zhen-hua(Fire Science and Engineering Institute,Nanjing Tech Uni.versity,Jiangsu Nanjing 210009,China;Institute of Fire Science and Engineering,Nanjing Tech University,Jiangsu Nanjing 210009,China)

机构地区：[1]南京工业大学安全科学与工程学院,江苏南京210009 [2]南京工业大学火灾与消防工程研究所,江苏南京210009

出　　处：《消防科学与技术》2018年第3期293-295,共3页Fire Science and Technology

基　　金：国家自然科学基金资助项目(51376089);2017中国消防协会科学技术年会"青年消防学者论坛"交流论文

摘　　要：采用自主设计的中尺度(0.60 m×0.25 m×0.25 m)阴燃实验平台,对密度为30、35 kg/m3的FPUF在2、3、5、7 L/min空气气流速率下进行阴燃实验研究。电加热器以8 k W功率从一端点燃样品,温度达到350℃时停止加热,研究气流速率对阴燃的影响。结果表明:在2、3、5、7 L/min空气气流速率下,两种密度FPUF的阴燃建立时间随气流速率增大而减小,阴燃传播速率均随时间呈线性增长。在5 L/min气流速率下,最高温度(距离热源48 cm处)分别可达到410、390℃。不同气流速率下两种FPUF阴燃温度为T(5 L/min)>T(3 L/min)>T(2 L/min)>T(7 L/min)。同一气流速率下,较低密度FPUF阴燃温度均高于较高密度FPUF。The mesoscale smoldering simulation device(0.60 m×0.25 m×0.25 m)was designed and the smoldering experiments of flexible polyurethane foam(FPUF)with density of 30、35 kg/m3 were car?ried out by it under air flow rate of 2,3,5 and 7 L/min.The sam?ples were heated from the end by electric heater of 8 kW until the temperature was 350℃.The influence of air flow rate on smolder?ing was researched.Results showed that building time of smolder?ing decreases with increasing of air flow rate under 2,3,5 and 7 L/min,while the smoldering spread rate increased linearly.The high?est temperatures(48 cm from the heater)of these two FPUF can be 410℃and 390℃respectively under air flow of 5 L/min.The smol?dering temperatures of both the FPUF under different air flow rates were as follows:T(5 L/min)>T(3 L/min)>T(2 L/min)>T(7 L/min),and the smoldering temperature of 30 kg/m3 FPUF is high?er than that of 35 kg/m3 FPUF.

关 键 词：软质聚氨酯泡沫 气流速率 阴燃 

分 类 号：X932[环境科学与工程—安全科学] TU532.4[建筑科学—建筑技术科学]