Abstract A standard 20 L spherical chamber was used to study the explosibility of hybrid mixtures systematically. Four different hybrid mixtures, which were composed of two different flammable gases (methane and ethylene) and two different flammable organic dusts (lycopodium and polyethylene), were selected. The maximum explosion pressure Pex and the maximum explosion rate of pressure rise (dP/dt)ex of the four different hybrid mixtures were measured under initial high turbulence conditions over a wide range of composition concentrations (volume concentration y for gas and mass concentration c for dust). Explosion behaviours of the four different hybrid mixtures were analysed and compared with each other. Experimental results have shown that adding different flammable gases to the same dust cloud can all increase the explosion severity of the dust. However, the increase is almost equivalent when different flammable gases with the same equivalent ratio at low values are added. Only if the equivalent ratio is sufficiently higher can a higher increase in the explosion severity be induced by the more explosible gas. Adding the same flammable gas to different dust clouds clearly increases the explosion severity of all these dusts, but the increased ratios of Pmax and (dP/dt)max are higher for the less explosible dusts, indicating that the influence of flammable gas on the explosion severity is more pronounced for less explosible dusts.

中文翻译：

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几种不同混合混合物的爆炸性比较分析

摘要 使用标准的20L球室系统研究了混合混合物的爆炸性。选择了四种不同的混合混合物，它们由两种不同的易燃气体（甲烷和乙烯）和两种不同的易燃有机粉尘（石松和聚乙烯）组成。四种不同混合混合物的最大爆炸压力 Pex 和压力上升的最大爆炸速率 (dP/dt)ex 是在初始高湍流条件下在很宽的成分浓度范围内（气体的体积浓度 y 和质量浓度 c灰尘）。对四种不同混合混合物的爆炸行为进行了分析和比较。实验结果表明，在同一个粉尘云中加入不同的可燃气体，都可以增加粉尘的爆炸严重程度。但是，当添加相同当量比的不同可燃气体时，增加量几乎是相等的。只有当当量比足够高时，更易爆炸的气体才能引起爆炸严重程度的更高增加。将相同的可燃气体添加到不同的粉尘云中明显增加了所有这些粉尘的爆炸严重性，但对于不易爆炸的粉尘，Pmax和(dP/dt)max的增加比更高，表明可燃气体对爆炸的影响对于不易爆炸的粉尘，严重性更为明显。只有当当量比足够高时，更易爆炸的气体才能引起爆炸严重程度的更高增加。将相同的可燃气体添加到不同的粉尘云中明显增加了所有这些粉尘的爆炸严重性，但对于不易爆炸的粉尘，Pmax 和 (dP/dt)max 的增加比率更高，表明可燃气体对爆炸的影响对于不易爆炸的粉尘，严重性更为明显。只有当当量比足够高时，更易爆炸的气体才能引起爆炸严重程度的更高增加。将相同的可燃气体添加到不同的粉尘云中明显增加了所有这些粉尘的爆炸严重性，但对于不易爆炸的粉尘，Pmax和(dP/dt)max的增加比更高，表明可燃气体对爆炸的影响对于不易爆炸的粉尘，严重性更为明显。