摘要
对微米级铝粉在1.3 L Hartmann管中的爆炸特性进行了实验研究。分析了最大爆炸压力pmax及最大压力上升速率(dp/dt)max与延迟点火时间t、粉尘浓度c、粉尘粒径d的关系。基于CFD计算软件Fluent 6.3建立了Hartmann管内微米级铝粉爆炸数值模拟模型,分析了火焰发展过程,将pmax、(dp/dt)max模型值与实验值进行了对比。结果表明,采用离散相模型能够模拟密闭容器内微米级非飘尘(d>10μm)铝粉的密闭爆炸,最大爆炸压力pmax的模拟误差不超过10%,最大压力上升速率(dp/dt)max模拟误差不超过30%。
The explosive characteristics of micron-grade aluminum dust is investigated in 1.3L Hartmann bomb.The relationship between the maximum pressure pmax,the maximum rate of pressure rise（dp/dt）max and ignition delay time t,dust concentration c,diameter d is analyzed.The numerical model of aluminum dust explosion in Hartmann bomb is established based on the CFD software.The flame propagation is analyzed according to the numerical results.The comparison of pmax,（dp/dt）max between numerical and experimental values is carried out.The results indicate that the micron-grade aluminum（d10 μm） dust explosion can be simulated by the discrete model.The error of pmax and（dp/dt）max is less than 10% and 30% respectively.
出处
《工业安全与环保》
北大核心
2011年第11期12-15,共4页
Industrial Safety and Environmental Protection
关键词
密闭容器
铝粉
爆炸特性
数值模拟
confined space aluminum dust explosive characteristics numerical simulation
