细水雾作用下原木楞堆燃烧特性的实验研究

Experimental research of combustion characteristics of log pile under water mist

在大尺寸实验室内,就细水雾抑制受限空间楞堆燃烧的有效性及影响因素进行实验研究。对楞堆火的初步实验表明:在细水雾的作用下楞堆火温度和热释放速率快速降低,且雾通量大的细水雾灭楞堆火更迅速,前期楞堆火更易被扑灭;细水雾汽化程度越高,在楞堆火上方漂浮、滞留时间越长,隔氧气作用就越明显,而雾通量太大则影响细水雾汽化效果。

The experiment was implemented in a standard room for the study of of log pile burning effectiveness and impact factors with water mist suppression in limited space. The experimental results show that wood pile fires is effectively restrained and extinguished by water mist, the temperature and heat release rate decrease rapidly with application of water mist. Preliminary fire is more easily extinguished. The more considerable vaporization of water mist, and longer floating time at the top of the log pile fire , the more obvious oxygen concentration decreased. But fog flux is too large to affect the vaporization of water mist.