摘要：在粉尘云电火花点火实验研究的基础上,结合粉尘云点火机理,建立完整的粉尘云点火模型。通过模型计算玉米淀粉的最小点火能,并模拟点火过程中颗粒温度随时间的变化过程,同时分析在无粉尘粒子情况下电火花温度的变化情况。通过模拟计算,得到玉米淀粉在敏感条件下的点火能为2.9 mJ,计算结果与实验数据基本一致,由此可以进一步理解粉尘云的点火过程及电火花放电过程。

关键词：粉尘爆炸；粉尘云；电火花；最小点火能

Abstract：Based on the analysis of experimental study of dust cloud spark ignition process，combined with dust ignition mechanism， a complete model of dust cloud spark ignition was established. The minimum ignition energy（MIE） of corn starch was calculated through the model. The process of ignition temperature of particles was simulated and the electric spark temperature in the absence of dust particles was analyzed. Through the simulation，the ignition energy of corn starch was 2.9 mJ，the results were basically consistent with experimental data. A better understanding of dust cloud ignition process was got. 

Keywords： dust explosion； dust cloud； spark； minimum ignition energy