A study of vented explosions in length/diameter (L/D) of 2 of cylindrical vessel with a duct pipe (L/D = 6) is reported. The influence of vent burst pressure and ignition locations on maximum overpressure generated inside the vessel, flame speeds and unburnt gas velocities ahead of the flame were systematically investigated. Propane and methane-air mixtures with equivalence ratio, ? of 0.8 to 1.6 have been used. Results show that rear ignition exhibits higher maximum overpressures and flame speeds in comparison to central ignition. It is confirmed that prior to the flame entry to the duct, the flow is chocked due to the sonic flow created at the duct entrance.
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机译：据报道，用导管（L / D = 6）对圆柱形容器的长度/直径（L / D）为2的放空爆炸进行了研究。系统地研究了排气口爆裂压力和点火位置对容器内部产生的最大超压，火焰速度和火焰前未燃烧气体速度的影响。丙烷和甲烷-空气混合物的当量比，？使用0.8至1.6。结果表明，与中央点火相比，后点火表现出更高的最大超压和火焰速度。可以确认，在火焰进入管道之前，由于管道入口处产生的声波流，气流被阻塞。
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