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对比研究了点火延迟时间,粉尘粒度和浓度对梯恩梯粉尘,黑索金粉尘和面粉的影响规律,定性讨论了含能材料和一般工业粉尘(需外界供氧)的爆炸过程。实验表明:空气中的氧浓度并非是含能材料粉尘爆炸的必要条件,爆炸的压力随浓度的增加而线性增加;粒度在一定范围内对爆炸峰值压力影响不大,压力上升速率随粒度的减小而增大,但增加趋势较一般工业粉尘平缓;点火延迟时间在一定范围内,对其峰值压力和压力上升速率的影响不明显。
The effects of ignition delay time, particle size and concentration of dust on TNT, dust and flour were compared. The explosion process of energetic materials and general industrial dust (external oxygen supply) was qualitatively discussed. Experiments show that the concentration of oxygen in air is not a necessary condition for dust explosion of energetic materials. The pressure of explosion increases linearly with the increase of concentration. The particle size has little effect on the peak pressure of explosion in a certain range. The rate of pressure increase decreases with the decrease of particle size But increased more slowly than that of common industrial dust. Ignition delay time was within a certain range, and the effect on peak pressure and pressure rise rate was not obvious.