The combustion characteristics of blended fuels pool fire were experimentally studied. Six square pools with length ranging from 5 cm to 20 cm were adopted, and mutually insoluble n-heptane-methanol blended fuels were used with different mixing proportions. In the experiments, burning rate and fuel temperature were measured and recorded during the whole combustion process. Results show that the special effect of azeotropism can influence the burning characteristics of n-heptane-methanol blended fuels to a large extent. For the cases with n-heptane fraction larger than the azeotropic proportion (0.485), there exists two burning stages of blended fuels and n-heptane, respectively; while if n-heptane fraction is smaller than 0.485, the two burning stages turn into blended fuels and methanol, respectively. In the steady burning stage of blended fuels, the fuels will burn together at the constant azeotropic proportion (0.485) regardless of the initial mixing proportions of liquid fuels. Due to the effect of azeotropism, the blended fuels are boiling at the azeotropic point (59.1 °C) lower than either boiling point of n-heptane and methanol, which leads to smaller mass loss rates compared to the pure fuel pool fires. That is, the azeotropism between n-heptane and methanol weakens the burning intensity of blended fuels compared to the pure fuel.

对混合燃料池火的燃烧特性进行了实验研究。采用六个长度在5到20厘米范围内的方池，并使用互不溶的正庚烷-甲醇混合燃料，混合比例不同。在实验中，在整个燃烧过程中测量并记录了燃烧速率和燃料温度。结果表明，共沸作用的特殊作用可以在很大程度上影响正庚烷-甲醇混合燃料的燃烧特性。对于正庚烷馏分大于共沸比例（0.485）的情况，混合燃料和正庚烷分别存在两个燃烧阶段。而如果正庚烷分数小于0.485，则两个燃烧阶段分别变为混合燃料和甲醇。在混合燃料的稳定燃烧阶段，不论液体燃料的初始混合比例如何，燃料都将以恒定的共沸比例（0.485）一起燃烧。由于共沸作用，混合燃料的沸点低于正庚烷和甲醇的沸点，共沸点（59.1°C），与纯燃料池燃烧相比，质量损失率更低。即，与纯燃料相比，正庚烷与甲醇之间的共沸作用削弱了混合燃料的燃烧强度。与纯燃料池火灾相比，这导致较小的质量损失率。即，与纯燃料相比，正庚烷与甲醇之间的共沸作用削弱了混合燃料的燃烧强度。与纯燃料池火灾相比，这导致较小的质量损失率。即，与纯燃料相比，正庚烷与甲醇之间的共沸作用削弱了混合燃料的燃烧强度。