柱形容器开口泄爆过程中的火焰传播特性

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 characteristics of flame propagation during explosion venting from cylindrical vessel

The mechanism of interactions between combustion and venting induced flow is the basis of venting research. The pressure histories and flame propagation inside cylindrical vessel during venting process are measured and analyzed. The experimental results show that the developments of pressure and flame propagation have clear characteristics at different venting condition. The venting induced flow result in the flame acceleration, deformation and area increase, and the strength of venting induced flow is dominated mostly by the venting area. When small vent with low/medium venting pressure, the histories of pressure and flame is similar to closed combustion, when large vent and small vent with high venting pressure, the flame deformed drastically and the velocity of flame propagation were accelerated saliently.