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在水平管道式粉尘爆炸装置中,通过大量实验研究了点火延迟时间、铝粉浓度和铝粉粒度对铝粉的最大爆炸压力和压力上升速率的影响。结果表明:对浓度和粒度一定的铝粉,存在—个可爆延迟时间范围,铝粉在该延迟时间范围内点火才能发生爆炸;同时,还存在—个最佳点火延迟时间可以使爆炸压力和压力上升速率同时达到最大值;铝粉的最大爆炸压力和压力上升速率随铝粉浓度的增大先增大后减小,随铝粉粒径的增大而减小。
In a horizontal duct-type dust explosion device, the effects of ignition delay time, aluminum concentration and aluminum particle size on the maximum explosion pressure and the rate of pressure rise of aluminum powder have been investigated experimentally. The results show that for an aluminum powder with a certain concentration and particle size, there exists a range of detonable delay time, and the aluminum powder can ignite within the delay time range to explode. At the same time, an optimum ignition delay time can make the explosion pressure and The maximum rate of pressure rise and pressure rise rate of aluminum powder first increases and then decreases with the increase of aluminum concentration, and decreases with the increase of aluminum powder particle size.