Inhibition effect of water mist on RDX dust explosion

HU Lishuang; LIU Yang; YANG Yajun; ZHU He; LIANG Kaili; HU Shuangqi

doi:10.11883/bzycj-2023-0346

Volume 44 Issue 5

May 2024

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HU Lishuang, LIU Yang, YANG Yajun, ZHU He, LIANG Kaili, HU Shuangqi. Inhibition effect of water mist on RDX dust explosion[J]. Explosion And Shock Waves, 2024, 44(5): 055401. doi: 10.11883/bzycj-2023-0346

Citation:

HU Lishuang, LIU Yang, YANG Yajun, ZHU He, LIANG Kaili, HU Shuangqi. Inhibition effect of water mist on RDX dust explosion[J]. Explosion And Shock Waves, 2024, 44(5): 055401. doi: 10.11883/bzycj-2023-0346

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Inhibition effect of water mist on RDX dust explosion

doi: 10.11883/bzycj-2023-0346

1.
School of Environment and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Shanxi Jiangyang Xing’an Industrial Explosive Materials Co., Ltd, Taiyuan 030041, Shanxi, China

Received Date: 2023-09-27
Rev Recd Date: 2023-12-01

Available Online: 2024-01-22

Publish Date: 2024-05-08

Abstract

Abstract

A visual square tube water mist suppression system was independently designed in order to study the inhibition effect of water mist on RDX dust explosion. The system is composed of closed explosion chamber, powder spraying system, ignition system, high-speed photography system, water mist generation system, data acquisition system and time control system. The automatic control of powder injection and ignition is carried out by the time control system. Various experimental conditions such as different nozzle types, nozzle diameters, and atomization pressures were selected. The effect of water mist on RDX dust explosion characteristics was evaluated by comparing the changes in flame propagation dynamics, explosion pressure, and explosion temperature of RDX dust explosion. The results show that the explosion pressure, and temperature of RDX dust clouds increase with the increase of explosive mass. The inhibition effect of water mist on RDX dust explosions varies with different types of nozzles at the same atomization pressure. The water mist sprayed by centrifugal nozzle has the best explosion inhibition effect, and the spiral nozzle has the worst explosion inhibition effect. As the atomization pressure increases, the explosion inhibition effect of water mist enhances. The water mist sprayed by centrifugal nozzle with diameter of 1.5 mm shows the optimal explosion inhibition effect among the five centrifugal nozzles with diameters of 0.8, 1.2, 1.5, 2.0, and 2.4 mm used in the experiment. The explosion pressure and temperature attenuation of water mist on RDX dust explosion increased with the increase of spray pressure. The explosion pressure of RDX dust is only 0.1184 MPa at an atomization pressure of 4 MPa. the peak pressure is reduced by 74.0% compared to the situation without water mist where the explosion pressure of RDX dust is 0.4561 MPa. The explosion temperature is 234 ℃, which is 69.8% lower than the explosion temperature of RDX dust without water mist (774 ℃).
- RDX,
- dust explosion,
- water mist,
- explosion inhibition,
- pressure

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References(20)

References

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