A modified reaction model of aluminum dust detonation

YUE Junzheng; HONG Tao; WU Xianqian; HUANG Chenguang

doi:10.11883/bzycj-2020-0349

Volume 41 Issue 8

Aug. 2021

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XU Qian, WANG Zhongqi. Model of seismic wave field excited by axially distributed explosive[J]. Explosion And Shock Waves, 2021, 41(7): 072302. doi: 10.11883/bzycj-2020-0236

Citation:

YUE Junzheng, HONG Tao, WU Xianqian, HUANG Chenguang. A modified reaction model of aluminum dust detonation[J]. Explosion And Shock Waves, 2021, 41(8): 082101. doi: 10.11883/bzycj-2020-0349

XU Qian, WANG Zhongqi. Model of seismic wave field excited by axially distributed explosive[J]. Explosion And Shock Waves, 2021, 41(7): 072302. doi: 10.11883/bzycj-2020-0236

Citation:

YUE Junzheng, HONG Tao, WU Xianqian, HUANG Chenguang. A modified reaction model of aluminum dust detonation[J]. Explosion And Shock Waves, 2021, 41(8): 082101. doi: 10.11883/bzycj-2020-0349

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A modified reaction model of aluminum dust detonation

doi: 10.11883/bzycj-2020-0349

1.
Institute of Mechanics, Chinese Academy of Science, Beijing 100190, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2020-09-23
Rev Recd Date: 2020-11-24

Available Online: 2021-07-27

Publish Date: 2021-08-05

Abstract

Abstract

The reaction model of aluminum particles is the key to successfully simulate the two-phase detonation of aluminum suspensions. In this study, by considering the endothermic decomposition reaction of the aluminum oxide (Al₂O₃) product at high temperature, a diffusion combustion model for the aluminum particles was improved and was incorporated into the homemade numerical code for 3D simulation of gas-solid two-phase detonation. The numerical program is based on the theory of two-phase flows, both gaseous and solid phases are assumed to be continuous media with inter-phase transfer of mass, momentum and energy. The system of 3D governing equations is solved in Cartesian x-y-z coordinates using an Eulerian grid, the numerical simulation code uses an explicit finite difference scheme based on the space-time conservation element and solution element (CE/SE) method, and the fourth order Runge-Kutta method is used to solve the source terms of the governing equations. In addition, the stability is assured by the Courant-Friedrichs-Lewy (CFL) criterion. Program parallelization is realized based on the message-passing-interface (MPI) technique, and the reliability of the program is demonstrated by simulating the shock tube problem successfully. Based on the program and the improved reaction model for the aluminum particles, numerical simulations for detonations of Al/air mixtures and Al/O₂ mixtures were performed, respectively, the simulated results of the steady detonation wave speeds are in agreement with the experimental results or the literature value, with the error of less than 5.5%, which demonstrate the validity of the improved reaction model for Al suspensions detonation in different oxidizing atmosphere. Moreover, the detonation parameters and the distributions of the physical quantities around the detonation wave are analyzed, and the influence law of the reaction model on the detonation wave structure is obtained.
- aluminum particles,
- reaction model,
- two-phase detonation,
- reverse reaction

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References(23)

References

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