.png){kind=icon}
.png){kind=icon}
Return
CFD simulation and experimental study of explosion behavior of RDX/Al dust in the 5 L spherical explosion chamber
.png){kind=icon}
OA
AI
M
H
X
J
E
Y
S
X
DOI：10.1016/j.dt.2026.07.010.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
RDX (hexogen) can rapidly release large amounts of heat and gaseous products during explosion, while aluminum powder provides sustained heat release. As a result, RDX/Al mixed dust usually exhibits higher energy release intensity and greater explosion severity. In this study, computational fluid dynamics (CFD) simulations and experiments were combined to investigate the explosion behavior of RDX, aluminum (Al), and RDX/Al mixed dusts in a 5 L spherical explosion chamber, with emphasis on the effects of dust concentration and mixing ratio. The results show that, during the dispersion stage, dust particles rise along the chamber wall under the action of airflow, recirculate from the upper region, and then descend toward the chamber center, finally forming a high-concentration dust column. For RDX dust, the flame first propagates downward along the central descending airflow and then expands upward under the action of high-temperature and high-pressure gases. Meanwhile, the mass fractions of CO2, H2O, CO, and H2 increase with increasing dust concentration. Aluminum powder releases more heat during explosion but shows smaller fluctuations in temperature evolution than RDX dust. For RDX/Al mixed dusts with different mixing ratios, the overall flame-front propagation direction is generally consistent, whereas the flame-front propagation velocity and temperature evolution differ significantly. In addition, the final mass fractions of CO and H2 first increase and then decrease with increasing RDX content. These findings provide valuable insights for explosion risk assessment and safety protection of energetic-material dusts.
Keywords:
RDX/Al
Dust explosion
CFD simulation
Energetic dust
Flame propagation
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
5.9
Papers:
1.9K
Citations:
6.4K
Organization
Cited Papers