小气量开敞空间可燃气云爆燃实验

Experimental investigation into deflagration of small-volume combustible vapour clouds

以乙炔 -空气混合形成的非理想爆源作为实验对象 ,从静、动态两方面即以三种可燃气云形状点火爆燃对火焰在气云 (开敞空间 )中产生的压缩波进行了系统的、较为全面的模拟实验 ,记录了实验过程的超压 -时间曲线 ,并对实验结果进行了比较和讨论 .结果表明 ,从能量释放角度出发 ,实际所发生的开敞空间可燃气云爆炸有演变为爆轰的趋势 ;

In this work using ethyne\|air mixture cloud as experimental object, the compressed wave produced by the flame in the vapour cloud opening to air was studied systematically and thoroughly through model experiments and researches on the static and dynamic aspects of three kinds of flammable vapour clouds, including static half\|ball, dynamic half\|ball and dynamic gauss\|distributing shape vapour cloud. The pressure time histories(p\|t curves) at different positions are given in this paper and the results are discussed and compared with each other. The results show that unconfined vapour cloud explosions can only produce weak shock waves and are nonideal explosions somewhat similar to those of bombs in the energy\|releasing speed aspect.