Methanol-gasoline has the risk of combustion and explosion in the process of production, storage, transportation, and use, however, there are relatively few studies on its combustion and explosion characteristics. In this paper, the explosion limit of methanol-gasoline, the influence of temperature on its explosion limit, and the flame propagation characteristics of methanol-gasoline in a spherical glass container were studied by experimental means. It was known from the experiment that the lower explosion limit of methanol-gasoline increased with the increase of methanol volume fraction. The initial temperature had little effect on the explosion limit of M15 methanol-gasoline. With the increase of temperature from 25 to 100 °C, the lower explosion limit of M15 dropped by 2.784%, and the upper explosion limit of M15 ranged from 11.253% to 11.451% at the initial temperature of 40–120 °C. In the upward and downward propagation phases, the average propagation velocity of the flame in the spherical glass container was close to each other, about 0.31 m/s. The research outcomes of this study have important guiding significance for evaluating the explosion hazard characteristics of methanol-gasoline and supplementing and improving the technical indicators of methanol-gasoline.

甲醇汽油在生产，储存，运输和使用过程中有燃烧和爆炸的危险，但是，关于其燃烧和爆炸特性的研究相对较少。本文通过实验方法研究了甲醇汽油的爆炸极限，温度对其爆炸极限的影响以及甲醇汽油在球形玻璃容器中的火焰传播特性。从实验中知道，甲醇-汽油的爆炸下限随甲醇体积分数的增加而增加。初始温度对M15甲醇汽油的爆炸极限影响不大。随着温度从25升高到100°C，M15的爆炸下限下降了2.784％，M15的爆炸上限在11.253％至11之间。初始温度为40–120°C时为451％。在向上和向下传播阶段，球形玻璃容器中火焰的平均传播速度彼此接近，约为0.31 m / s。本研究的研究成果对评价甲醇汽油的爆炸危险特性，补充和完善甲醇汽油的技术指标具有重要的指导意义。