圆柱形管道旁侧油气泄爆实验研究

油气是一种组分复杂的可燃气体，极易发生爆炸。为了研究油气在受限空间的泄爆规律，对不同体积分数油气在圆柱形直管道旁侧的单孔和双孔泄爆进行了可视化实验，获得了管道内外流场的爆炸超压规律和管道外流场的火焰特征。发现油气泄爆过程存在未燃气体从开孔泻出、形成“蘑菇云”、持续剧烈燃烧、逐渐熄灭4个阶段。通过对最大爆炸超压的数据对比分析，获得了双孔泄爆可以数倍分流单孔的外部最大超压；开孔位置距点火端越远，孔外最大超压越大；泄爆中外流场最大超压远大于内流场最大超压等结论。

Experimental study for lateral gasoline-air venting explosion in cylindrical pipeline

Gasoline-air, being composed of combustible components, is apt to brings about explosion accidents. In order to study the laws governing its venting explosion in a confined space, we carried out visualization experiments on a single pore and double pores laterally situated along the shell of a cylindrical pipeline with different gasoline-air volume fractions, obtained some flame characteristics of outflow field and regularities of explosion overpressure for the pipeline's internal and external flow, and found out the four stages of the venting explosion including the flam eventing from the pore, the mushroom-cloud forming, the gradual violent burning and extinguishing. Through a comparative analysis of the data of explosion overpressure, we found that the external maximum overpressure of the double pores was several times larger than that of the single pore, and that the farther away from the ignition end, the bigger the maximum overpressure of the internal flow field.