基于20L球形爆炸装置的微米级铝粉爆炸特性实验

发布时间：2018-05-22 19:30

  本文选题：微米铝粉 + 最大爆炸压力　； 参考：《北京理工大学学报》2016年07期

【摘要】：采用20L球形爆炸装置,对6种不同粒径分布的微米铝粉在不同浓度下的爆炸特性进行了实验研究,考察了浓度和粒径对铝粉爆炸特性的影响规律,并分析了其爆炸产物的表面特征.结果表明,铝粉的最大爆炸压力、压力上升速率和爆炸指数随铝粉浓度的增加呈抛物线变化,在最适爆炸浓度(copt=500g/m3)时三者均达到峰值.随着铝粉粒径的减小时,最大爆炸压力、压力上升速率呈指数增加趋势,且在铝粉粒径小于10μm时,其增幅更为显著.爆炸过程中的铝粉粉尘云的燃烧时间随铝粉浓度的增大呈指数规律衰减并趋于平缓,同时随着铝粉粒径的减小而降低.
[Abstract]:By using 20L spherical explosive device, the explosion characteristics of six kinds of micron aluminum powder with different particle size distribution at different concentrations were studied experimentally, and the effects of concentration and particle size on the explosion characteristics of aluminum powder were investigated. The surface characteristics of the explosive products were also analyzed. The results show that the maximum explosion pressure, pressure rise rate and explosion index of aluminum powder vary in parabola with the increase of aluminum powder concentration, and reach the peak at the optimum explosion concentration of 500 g / m ~ (3). With the decrease of the particle size of aluminum powder, the maximum explosion pressure and the pressure rising rate increase exponentially, and the increase is more obvious when the particle size of aluminum powder is less than 10 渭 m. The combustion time of aluminum dust cloud decreases exponentially with the increase of aluminum powder concentration and decreases with the decrease of aluminum particle size.
【作者单位】： 中国矿业大学安全工程学院煤矿瓦斯与火灾防治教育部重点实验室;
【基金】：国家自然科学基金资助项目(51204169,51574230) 江苏省自然科学基金资助项目(BK20131115)
【分类号】：TG146.21;O38
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本文编号：1923330