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Effects of particle morphology on transient dispersion and explosion flame propagation of aluminum powder
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Dongyang QIU, Xianfeng CHEN, Lijuan LIU, Chuyuan HUANG, Jun WANG**, Xuxu SUN
China Safety Science Journal | 2026, 36(2) : 189 - 198
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China Safety Science Journal | 2026, 36(2): 189-198
• Public Safety and Emergency Management •
Effects of particle morphology on transient dispersion and explosion flame propagation of aluminum powder
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Dongyang QIU, Xianfeng CHEN, Lijuan LIU, Chuyuan HUANG, Jun WANG**, Xuxu SUN
Affiliations
  • School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan Hubei 430070, China
Published: 2026-02-28 doi: 10.16265/j.cnki.issn1003-3033.2026.02.0582
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To investigate the influence of particle morphology on the explosion characteristics of aluminum powder, spherical aluminum powder (SAP) and flake aluminum powder (FAP) were selected as research subjects. By combining particle image velocimetry with vertical duct explosion experiments, the effects of particle morphology on transient dispersion behavior and flame propagation characteristics were systematically analyzed. The results show that FAP, due to its larger specific surface area and the asymmetric geometry, exhibits stronger suspension capability and turbulence-inducing effects, leading to a more uniform dispersion state under the same mass concentration. Influenced by enhanced turbulence, increased particle population in the critical ignition zone, and greater suspension stability, FAP demonstrates faster ignition response and significantly promoted flame front wrinkling. At a concentration of 350 g/m3, its flame propagation velocity reaches 44.1 m/s, which is 32.8% higher than that of SAP. In contrast, SAP tends to form localized high-mass concentration regions due to agglomeration, resulting in a white overexposure area accounting for 98.6% during the explosion, indicating a more concentrated heat release behavior.

aluminum powder  /  particle morphology  /  transient dispersion  /  turbulence intensity  /  explosion flame
Dongyang QIU, Xianfeng CHEN, Lijuan LIU, Chuyuan HUANG, Jun WANG, Xuxu SUN. Effects of particle morphology on transient dispersion and explosion flame propagation of aluminum powder[J]. China Safety Science Journal, 2026 , 36 (2) : 189 -198 . DOI: 10.16265/j.cnki.issn1003-3033.2026.02.0582
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Article Info
doi: 10.16265/j.cnki.issn1003-3033.2026.02.0582
  • Receive Date：2025-09-29
  • Online Date：2026-07-08
  • Published：2026-02-28
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  • Received：2025-09-29
  • Revised：2025-12-03
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    School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan Hubei 430070, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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