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为了揭示可碳化固体可燃物在高原地区的火蔓延特性,实验选取了质地较为均匀的白木为研究对象,分别在海拔3658m的拉萨和50m的合肥进行了一系列实验,通过测量不同宽度、倾斜角度下白木表面火焰高度、火蔓延速度、火焰温度、试样表面温度等参数,定量分析了高原环境下可碳化固体表面火蔓延的特性.结果表明,在高原低氧浓度和低压力条件下,火焰高度和表面火蔓延速度都有所降低,但火焰温度却略有升高;当试样宽度增大时,合肥与拉萨的火蔓延相对速度差值越来越小.
In order to reveal the fire spread characteristics of carbonizable solid combustibles in the plateau area, we selected white wood with more uniform texture as the research object, carried out a series of experiments at Lhasa at an elevation of 3658m and Hefei at a depth of 50m. By measuring the width, Under the condition of low oxygen concentration and low pressure, the characteristics of flame spread, fire spread speed, flame temperature, sample surface temperature and other parameters were analyzed quantitatively under the condition of low altitude and low pressure Both the height and the surface fire spread rate decreased, but the flame temperature slightly increased. When the specimen width increased, the difference in the relative speed of fire spread between Hefei and Lhasa became smaller and smaller.