Experimental study on the burning behavior of cardboard box fire under low air pressure

Ma Qiuju; Shao Juncheng; Wan Mengsai; Liu Quanyi; Zhang Hui

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Experimental study on the burning behavior of cardboard box fire under low air pressure

机译：低空气压力下纸板箱火灾燃烧行为的实验研究

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The objective of this work is to study the fire behavior characteristics under low pressures. Cardboard box fire experiments of two kinds of fire load, 1-box and 2-box fires, were conducted separately at 101 kPa, 75 kPa, 64 kPa, and 59.5 kPa in an altitude chamber. The heat release rate, mass burning rate, residual ash mass and radiative heat flux were measured as the principal characteristic parameters for analysis. The results of these tests demonstrated the significant effects on fire behaviors caused by low-pressure atmosphere. The mass burning rate shows power function growth with the air pressure as m/D similar to((PL3)-L-2)(0.305). The proportion of residual ash increases linearly with the pressure drop, and it reaches as high as 44% for 1-box fire at 59.5 kPa. While the proportion of residual ash for 2-box fire is lower compared with 1-box fire, which means the combustion of 2-box fire is more complete. The effective heat of combustion (EHC) obtained for 101 kPa, 75 kPa, 64 kPa, and 59.5 kPa are respectively 18.44, 17.08, 15.10, and 12.74 kJ/g. Furthermore, the heat radiation fraction was calculated based on the simplified measuring method and it is observed that radiation fraction depends less on the environment pressure.

机译：这项工作的目的是在低压下研究火灾行为特征。纸板箱防火实验两种火力载荷，1箱和2箱火灾，在101 kPa，75 kPa，64 kPa和59.5 kpa中分别进行的高度腔室进行。测量热释放速率，质量燃烧速率，残留灰分和辐射热通量作为分析的主要特征参数。这些试验的结果表明了由低压气氛引起的火灾行为的显着影响。质量燃烧速率显示电力功能的增长，空气压力为类似于（（PL3）-L-2）（0.305）。残留灰分的比例随压力下降线性增加，并且在59.5kPa的1箱火力下达到44％。虽然与1箱火相比，2箱火灾的残留灰的比例较低，但这意味着2箱火的燃烧更加完整。获得101kPa，75kPa，64kPa和59.5kPa的燃烧（EHC）的有效热量分别为18.44,17.08,15.10和12.74 kJ / g。此外，基于简化的测量方法计算热辐射级分，观察到辐射级分少于环境压力。

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来源
《Fire and materials》 |2021年第2期|273-282|共10页
作者
Ma Qiuju; Shao Juncheng; Wan Mengsai; Liu Quanyi; Zhang Hui;
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作者单位

China Univ Min & Technol Beijing State Key Lab Coal Resources & Safe Min Beijing Peoples R China|China Univ Min Technol Beijing Sch Emergency Management & Safety Engn Beijing 100083 Peoples R China;

China Univ Min & Technol Beijing State Key Lab Coal Resources & Safe Min Beijing Peoples R China|China Univ Min Technol Beijing Sch Emergency Management & Safety Engn Beijing 100083 Peoples R China;

China Univ Min & Technol Beijing State Key Lab Coal Resources & Safe Min Beijing Peoples R China|China Univ Min Technol Beijing Sch Emergency Management & Safety Engn Beijing 100083 Peoples R China;

Civil Aviat Flight Univ China Coll Civil Aviat Safety Engn Guanghan Peoples R China;

Tsinghua Univ Inst Publ Safety Res Dept Engn Phys Beijing Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
cardboard box fire; EHC; low pressure; mass loss rate; radiation fraction;

机译：纸板箱火;EHC;低压;质量损失率;辐射分数;

Experimental study on the burning behavior of cardboard box fire under low air pressure

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