To study and compare the combustion and smoke characteristics at different altitudes, a set of n-heptane pool fire experiments were conducted in Lhasa and Hefei. The combustion and smoke parameters, such as fuel mass loss, flame temperature, irradiance, transmittance through smoke, flame height and smoke concentration, were measured. The experimental results show that, with the increase of altitude, burning rate per unit area, average flame axis temperature, radiation heat flux, smoke emissivity, carbon monoxide and carbon dioxide concentrations decrease.%为了研究高原地区低压低氧环境下的燃烧特性和烟气特性,在拉萨和合肥两地区分别进行了正庚烷油盆火实验.实验测量了油盆上方温度、热辐射通量、燃料失重速率、烟气热辐射发射率、烟气组分浓度和火焰高度等燃烧和烟气参数.结果表明:随着海拔高度的升高,油盆火单位面积燃烧速率降低,火焰及热烟气温度降低,对周围环境的热辐射通量和单位面积辐射热损失减小,烟气发射率降低,烟气中碳颗粒、CO和CO2体积分数降低.
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