Loading Characteristics and Flowability of Boron-based Powder Fuels with Different Particle Size Gradations

被引：0
|
作者：
Zhang L.-F. [1 ]
Yang J.-W. [2 ]
Lu X. [1 ]
Li X.-H. [1 ]
Shi C. [1 ]
Hao M.-S. [1 ]
You Y. [1 ]
机构：
[1] Military Representative Bureau of Army Equipment in Xi'an, Xi'an
[2] Xi'an University of Technology, Xi'an
来源：
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2024年 / 47卷 / 01期
关键词：
boron powder; fluidized transport; loading characteristics; physical chemistry; powder fuel; powder ramjet;
D O I：
10.14077/j.issn.1007-7812.202304015
中图分类号：
学科分类号：
摘要：
To reveal the effect of particle size gradation on the loading characteristics and flowability of powder fuels and improve the working performance of powder ramjet engines, the effects of particle properties and grading methods on the loading characteristics and flowability of powder fuels were investigated taking boron-based powder fuels as research object. And the fluidized transport performance of the graded powder was verified by powder supply system. The results show that the filling of small-size particles in the gap of large-size particles can improve the filling density but reduce the flowability. When the smallsize particles in the multi-stage graded powder are less flowable, the filling density of premixed graded particles is higher than that of batch filling method, and vice versa. The particle size distribution of boron-based powder fuel prepared by agglomerated granulation has the characteristics of fractal distribution. The fractal gradation method can also increase the particle filling density by about 15.7%, the fractal dimension after fractal grading is 2.33, filling density is 0.957 g/cm3 and filling rate is 53.8%, maintaining good fluidization performance. © 2024 China Ordnance Industry Corporation. All rights reserved.
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页码：91 / 96
页数：5
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