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泄爆过程中流动与燃烧的相互作用机制是研究开口泄爆问题的关键。对柱形容器泄爆过程中压力与火焰发展传播过程的观测与分析表明,不同泄爆条件下压力与火焰的发展传播具有明显特点。泄爆诱导流动通过加速火焰传播、加剧火焰变形、增大火焰面积对容器内燃烧产生增强作用,泄爆流动大小主要由泄爆面积决定。小口中低压泄爆过程压力与火焰的发展过程与封闭燃烧中类似;小口高压以及大口泄爆过程中,火焰变形剧烈,传播速度明显上升,并导致压力的回升。
The mechanism of the interaction between flow and combustion during venting is the key to studying the problem of venting explosion. The observation and analysis of the propagation of pressure and flame in the process of venting of cylindrical vessel show that the pressure and flame propagation have distinct characteristics under different venting conditions. Explosion-induced flow through the accelerated flame spread, aggravate the flame deformation, increase the flame area of the container to enhance the combustion effect, the size of the vent flow is mainly determined by the vent area. During the process of small mouth high pressure and large mouth explosion, the flame deformation is violent and the propagation speed obviously increases, which leads to the pressure rise.