The safety issues and existing risks of ethanol-gasoline in industrial production have to be well considered and investigated. Especially when there are more than one thin doors, windows/thin walls in containers were broken once deflagrations occurred, but it appears that few researches deal with multi vented deflagrations. Hence we carried out experiments in a small cuboid container to investigate the effect of multiple vents’ numbers and distributions on vented ethanol-gasoline vapor deflagrations characteristics. Multi overpressure peak structures during multi-vented deflagrations were first observed and analyzed to reveal the complex physical process in the venting. Results show that five overpressure peaks’ structures were found ($P_b$, $P_{fv}$, $P_{cv}$, $P_{ext}$ and $P_{ac}$) when multiple vents with the same area are arranged along the axis of the container’s roof. Flame propagation and overpressure buildup are mainly influenced by the 1st vent (i.e., the nearest one to the spark plug). The 1st vent also determines the number and types of overpressure peak structures. Compared with the single vent, the cases of multiple vents with the constant total vent area may cause larger $P_{max}$, ${\left(dP/dt\right)}_{max}$ and $K_G$ even if all vents are closer to the spark plug. Consequently, the use of multiple vents does not necessarily help to improve the vent effects.

工业生产中乙醇汽油的安全问题和存在的风险必须得到很好的考虑和调查。特别是当有不止一个薄门时，一旦发生爆燃，容器中的窗户/薄壁就会被打破，但似乎很少有研究处理多通风爆燃。因此，我们在一个小的长方体容器中进行了实验，以研究多个通风口的数量和分布对排放的乙醇-汽油蒸气爆燃特性的影响。首次观察和分析了多排气爆燃过程中的多个超压峰值结构，揭示了排气中复杂的物理过程。结果表明，发现了五个超压峰的结构（${磷}_{乙}$, ${磷}_{Fv}$, ${磷}_{Cv}$, ${磷}_{\mathrm{电子}X吨}$ 和 ${磷}_{\mathrm{一种}C}$) 当具有相同面积的多个通风口沿集装箱顶部的轴线布置时。火焰传播和超压积聚主要受第一个通风口（即离火花塞最近的一个）的影响。第一个排放口还决定了超压峰结构的数量和类型。与单个通风口相比，在总通风口面积不变的情况下，多个通风口的情况可能会导致更大的${磷}_{米\mathrm{一种}X}$, ${\left(d磷/d吨\right)}_{米\mathrm{一种}X}$ 和 ${钾}_G$即使所有通风口都更靠近火花塞。因此，使用多个通风口不一定有助于改善通风口效果。