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通过模拟实验 ,对不同工况下木材表面的火蔓延特性进行了动态测量研究。首先应用火焰结构显示技术连续观察和记录了木材表面的火蔓延行为和火焰的热结构 ;其次 ,利用温度示踪技术对火蔓延过程进行了动态观测 ,进而获取了在不同条件下的火蔓延速率并分析讨论了木材表面火蔓延的机理。实验研究表明 :在静止条件下 ,木材表面的火蔓延主要受辐射和热传导作用的控制 ,而在顺风条件下 ,对流传热传质则起重要作用 ,且在一定风速范围内 ,火蔓延速率随风速的增大而增大。
Through the simulation experiment, the fire spread characteristics of the wood surface under different working conditions were studied dynamically. Firstly, the flame structure display technology was used to continuously observe and record the fire spread behavior and flame thermal structure of the wood surface. Secondly, the flame propagation technology was observed by using temperature tracing technique, and then the fire spread rate under different conditions The mechanism of fire spread on the surface of wood was analyzed and discussed. Experimental studies show that under static conditions, the spread of fire on the wood surface is mainly controlled by radiation and heat conduction, while convective heat and mass transfer plays an important role in downwind conditions. In a certain wind speed range, the fire spread rate Wind speed increases and increases.