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以3种不同粒径的纳米铝粉为研究对象,采用20L球形爆炸测试装置对纳米铝粉的爆炸特性进行了实验研究.通过对实验过程中纳米铝粉的爆炸过程和爆炸特性数据的分析,得出纳米铝粉的爆炸规律.纳米铝粉的最大爆炸压力和最大压力上升速率受粉尘浓度的影响.当粉尘浓度在0.50kg/m3以下时,爆炸压力随粉尘浓度的增加而有较明显的增大,并逐渐趋向最大值,并在一定范围内趋于稳定;当浓度超过1.25kg/m3以后,最大爆炸压力随粉尘浓度的增加而减小.最大压力上升速率随粉尘浓度的变化与最大爆炸压力随粉尘浓度变化的规律相似.
In this paper, three kinds of nano-sized aluminum powders with different grain sizes were selected as the research objects, and the explosion characteristics of the nano-aluminum powder were investigated by using a 20L ball explosion test device.By analyzing the explosion process and the explosion characteristic data of the nano- The explosion law of nano-scale aluminum powder was obtained.The maximum explosion pressure and the maximum pressure rise rate of nano-scale aluminum powder were affected by the dust concentration.When the dust concentration was under 0.50kg / m3, the explosion pressure was more obvious with the increase of dust concentration Increases and gradually approaches the maximum value and tends to be stable within a certain range. When the concentration exceeds 1.25 kg / m3, the maximum explosion pressure decreases with the increase of dust concentration.The maximum pressure rise rate changes with the maximum dust concentration Explosion pressure with the dust concentration changes similar.