Dynamic concentration measurement of micro/nano aluminum powder

Fu, Shenghua; Lou, Wenzhong; Wang, Jingkui; Ji, Tongan; Li, Chubao; Chen, Zhaohui

doi:10.1016/j.powtec.2020.11.052

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…The results showed that the critical initiation energy of different fuels approached to the lowest at each stoichiometric ratio and appeared a typical U-shape curve versus fuel concentration. Further, some novel technologies [17,18] were also developed to measure the concentration and distribution of solid aluminum particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of disperse process of fuel‐air explosive based on the computational fluid dynamics

Ruipeng,

Xianzhen,

Wengang

et al. 2023

Propellants Explo Pyrotec

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The formation process of fuel cloud is easily affected by the material properties of fuel mixture and the structural qualities of manufacture. The spread region of fuel cloud plays an important role in the damage performance of FAE bomb. However, there are not sufficient simulation study on the disperse process, lacking a useful model for calculating the fuel cloud size due to the physical complexity in disperse process. In this work, a FAE bomb was designated at first and an experiment was carried out to measure the fuel cloud diameters. And then a computational model was established to illustrate the formation process of fuel cloud. This computational model consisted of an explosion dynamics model in the near‐field stage and a fluid dynamics model in the far‐field stage. Furthermore, multiphase turbulence flow, discrete phase and species chemical transportation were incorporated in the fluid dynamics model. The results showed that good agreements were yielded by comparison of the simulation results and experimental data for the fuel cloud diameters. The fuel cloud diameter at 220 ms was 9.11 m for simulation and 9.37 m for experiment. Additionally, it was also discussed the influence of particle size distribution on the formation process of fuel cloud. Larger particles were more likely to aggregate at the outside region of fuel cloud due to individual inertial influence. This study can provide an effective computation model for evaluation of the fuel cloud region, which can be worthwhile in understanding the physical mechanism of disperse process.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of disperse process of fuel‐air explosive based on the computational fluid dynamics

Ruipeng,

Xianzhen,

Wengang

et al. 2023

Propellants Explo Pyrotec

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“…As for fuel dispersal, at present, some work focused on the single-component fuel dispersion has been carried out by static small-scale experiments [4][5][6] and numerical simulations [7][8][9][10]. A robust and efficient algorithm for the simulation of explosive liquid-gas flows with fluid-structure interaction is provided [11].…”

Section: Introductionmentioning

confidence: 99%

Systematic Analysis on Gas‐Liquid‐Solid Three‐Phase Flow and Initiation Structure for Fuel‐Air Explosive Weapon Reliability

Zhang

2021

Propellants Explo Pyrotec

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The missile safety and reliability play important roles in its evaluation and design. Failure or inaccuracy of initiation is an occasional but extremely troublesome hazard in weapon system safety. The uneven fuel distribution and uncontrollable motion of initiation structure are both the causations of this hazard in a double-event fuel-air explosive missile application. Thus, it is crucial to implement the coupling between the initiation structure and the fuel field to succeed in a reliable application. This paper employs CFD to simulate the explosive dispersal process of fuel and uses MATLAB to investigate the motion trajectory of the initiation structure. As for the solid-liquid fuel com-posed of 50 % aluminum powder and 50 % propylene oxide, its optimal concentration for reliable initiation is 186 275 g/m 3 . In the case of a 200 kg missile with a speed of 300 m/s, the results imply that, at 250 ~300 ms which is a reliable initiation time, the initiation structure gets to the reliable range of 10.8 ~14.1 m where the fuel concentration approaches to the optimal range for initiation. Ultimately, for any missile development, the coupled simulation-based approach is summarized to prevent the initiation failure and enhance its inherent safety, so as to avoid accident casualties and property loss.

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Experimental and numerical investigations on electromagnetic powder compaction of Aluminium 6061 alloy powder

Thirupathi

Kumar²,

Kore

2022

Powder Technology

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Dynamic concentration measurement of micro/nano aluminum powder

Cited by 3 publications

References 19 publications

Numerical simulation of disperse process of fuel‐air explosive based on the computational fluid dynamics

Numerical simulation of disperse process of fuel‐air explosive based on the computational fluid dynamics

Systematic Analysis on Gas‐Liquid‐Solid Three‐Phase Flow and Initiation Structure for Fuel‐Air Explosive Weapon Reliability

Experimental and numerical investigations on electromagnetic powder compaction of Aluminium 6061 alloy powder

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