摘要：为探究粉尘爆炸实验中粉尘质量浓度、点火能量、点火延迟时间及惰性物质质量分数对粉尘爆炸猛度的影响, 采用正交试验法并利用20 L球形爆炸测试装置研究了最大爆炸压力和最大升压速度。结果表明:对最大爆炸压力和最大升压速率影响最为显著的因素分别为粉尘质量浓度和点火能量;在实验浓度范围内, 最大爆炸压力及最大升压速率随粉尘质量浓度、点火能增加而增加, 随惰性物质质量分数增加而降低;同一质量浓度时最大爆炸压力下降值与惰性物质质量分数增加值线性相关, 最大升压速率上升值与点火能增加值线性相关;同时, 最大爆炸压力及最大升压速率受粉尘质量浓度影响显著。

关键词：铝粉；正交试验；粉尘爆炸；点火能量；点火延迟时 间；惰性物质质量分数；粉尘浓度

Abstract：In order to explore the effects of dust mass concentration, ignition energy, ignition delay time and inert mass fraction on the violence of aluminum dust explosion, the maximum explosion pressure and the maximum rate of pressure rise were conducted with 20 L spherical explosion test device and based on orthogonal experiment. The results show that dust mass concentration has the most significant effect on the maximum explosion pressure and ignition energy has the greatest effect on the maximum rate of pressure rise. Within the experimental concentration range, the maximum explosion pressure and the maximum rate of pressure rise increase with increasing dust concentration and ignition energy and decrease with increasing inert mass fraction. Under the same mass concentration, the maximum explosion pressure decreases linearly with increasing inert mass fration and the maximum rate of pressure rise increases linearly with the increase of ignition energy. Meanwhile, dust mass concentration has both significant effect on the maximum explosion pressure and the maximum rate of pressure rise.

Keywords：aluminum powder；orthogonal experiment；powder explosion；ignition energy；ignition delay time；inert material mass fraction；dust concentration