RDX Dust Explosion Characteristics Based on 5L Chamber

doi:10.12382/bgxb.2024.0554

Abstract

Abstract:

The explosion pressures and pressure rise rates of ordinary industrial Al dust and RDX dust at different concentrations are studied by using a self-made 5L columndust explosion test device, and the measured data are compared with thosein a 20L spherical dust explosion test device. The differences in the dust explosion pressure tests of the two test devices are analyzed. The results show that the parameters of explosive dust measured in 5L column dust explosion test deviceare relatively small, which not only reduces the experimental cost but also improves the experimental safety. The influences of different volume explosion test devices have negligible effects on RDX dust explosion pressure, but have great influences on the explosion pressure rise rate of RDX dust and the explosion characteristics of Al dust. The analysis shows that the optimal design of umbrella-cap nozzle in the self-made 5L column can improve the turbulence of the device and make the dust distribution more uniform. The strong preheating from the chemical igniter in the small chamber affects the dust before the flame front arrives, causing the partial reactions and forming a more active mixture, speeding up the combustion process, which has a great effect on the explosive characteristics of Al dust.

Key words: dust explosion, RDX, explosion pressure, rate of explosion pressure rise, test device

CLC Number:

X932

JIANG Chunlei, CAO Xiong, REN Wei, WANG Li, LIU Luoyi, WANG Chunyan. RDX Dust Explosion Characteristics Based on 5L Chamber[J]. Acta Armamentarii, 2024, 45(S1): 105-111.

Figures/Tables 7

References 23

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铝粉浓度/ (g· m^-3)	最大爆炸压力/MPa		最大压力上升速率/(MPa· s^-1)
铝粉浓度/ (g· m^-3)	5L柱	20L球	5L柱	20L球
300	0.60	0.58	26.32	21.43
400	0.68	0.59	34.09	26.05
500	0.85	0.66	36.91	26.90
600	0.80	0.62	34.67	25.39
700	0.82	0.64	32.80	25.27
800	0.79	0.60	34.57	24.16
900	0.75	0.63	32.40	22.77

铝粉浓度/ (g· m^-3)	最大爆炸压力/MPa		最大压力上升速率/(MPa· s^-1)
铝粉浓度/ (g· m^-3)	5L柱	20L球	5L柱	20L球
300	0.60	0.58	26.32	21.43
400	0.68	0.59	34.09	26.05
500	0.85	0.66	36.91	26.90
600	0.80	0.62	34.67	25.39
700	0.82	0.64	32.80	25.27
800	0.79	0.60	34.57	24.16
900	0.75	0.63	32.40	22.77

RDX浓度/ (g· m^-3)	最大爆炸压力/MPa		最大压力上升速率/(MPa· s^-1)
RDX浓度/ (g· m^-3)	5L柱	20L球	5L柱	20L球
300	0.58	0.62	8.7	12.58
400	0.74	0.77	18.61	24.10
500	0.92	1.08	23.88	30.39
600	1.06	1.23	33.94	46.71
700	1.30	1.38	43.95	58.11
800	1.44	1.48	49.92	63.86
900	1.59	1.71	56.49	76.88

RDX浓度/ (g· m^-3)	最大爆炸压力/MPa		最大压力上升速率/(MPa· s^-1)
RDX浓度/ (g· m^-3)	5L柱	20L球	5L柱	20L球
300	0.58	0.62	8.7	12.58
400	0.74	0.77	18.61	24.10
500	0.92	1.08	23.88	30.39
600	1.06	1.23	33.94	46.71
700	1.30	1.38	43.95	58.11
800	1.44	1.48	49.92	63.86
900	1.59	1.71	56.49	76.88