Studies on aluminum powder combustion in detonation environment

doi:10.1088/1674-1056/ac373e

Abstract The combustion mechanism of aluminum particles in a detonation environment characterized by high temperature (in unit 10³ K), high pressure (in unit GPa), and high-speed motion (in units km/s) was studied, and a combustion model of the aluminum particles in detonation environment was established. Based on this model, a combustion control equation for aluminum particles in detonation environment was obtained. It can be seen from the control equation that the burning time of aluminum particle is mainly affected by the particle size, system temperature, and diffusion coefficient. The calculation result shows that a higher system temperature, larger diffusion coefficient, and smaller particle size lead to a faster burn rate and shorter burning time for aluminum particles. After considering the particle size distribution characteristics of aluminum powder, the application of the combustion control equation was extended from single aluminum particles to nonuniform aluminum powder, and the calculated time corresponding to the peak burn rate of aluminum powder was in good agreement with the experimental electrical conductivity results. This equation can quantitatively describe the combustion behavior of aluminum powder in different detonation environments and provides technical means for quantitative calculation of the aluminum powder combustion process in detonation environment.

Keywords: aluminum particle combustion model aluminum powder burn rate equation burning time

Received: 14 September 2021
Revised: 05 November 2021
Accepted manuscript online: 06 November 2021

PACS:	47.40.Rs	(Detonation waves)
	47.70.Pq	(Flames; combustion)
	47.40.Nm	(Shock wave interactions and shock effects)
	82.33.Vx	(Reactions in flames, combustion, and explosions)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11772058).

Corresponding Authors: Jian-Xin Nie
E-mail: niejx@bit.edu.cn

Cite this article:

Jian-Xin Nie(聂建新), Run-Zhe Kan(阚润哲), Qing-Jie Jiao(焦清介), Qiu-Shi Wang(王秋实), Xue-Yong Guo(郭学永), and Shi Yan(闫石) Studies on aluminum powder combustion in detonation environment 2022 Chin. Phys. B 31 044703

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