Three-dimensional Numerical Simulation of Detonation Aftereffect of Suspended Aluminum Dusts in Corner Space

doi:10.19596/j.cnki.1001-246x.8004

Abstract

Abstract: A three-dimensional two-phase detonation model for aluminum dusts/air mixtures is built. A 3D numerical simulation program for detonation of suspended Al dusts is developed with space-time conservation element and solution element (CE/SE) method. Moreover, program parallelization is realized based on message passing interface (MPI) technique. Reliability of the program is demonstrated with simulation of shock tube problem and two-phase detonation experiment of Al particles/air mixtures in a detonation tube. Two-phase detonation of 368 g·m^-3 Al particles/air mixtures in left space of a corner and its aftereffect on air in the right and lower space of the corner are investigated. Propagation, reflection and diffraction of detonation wave or shock wave in complex space are obtained. It shows that air shock wave generated by two-phase detonation can reach a reflection pressure of 2.66 MPa at the solid wall 2 m far away from the Al dusts region. Fireball range exceeds initial Al dusts region by about 0.8 m. Air temperature within a range of 1.5 m near the initial Al dusts region is more than 1 600 K. The program can be used for aftereffect study of Al dusts detonation. It provides guidance for industrial safety and protection.

Key words: aluminum dusts, two-phase detonation, three-dimensional program development, detonation aftereffect

CLC Number:

O381

YUE Junzheng, DONG Hefei, HONG Tao. Three-dimensional Numerical Simulation of Detonation Aftereffect of Suspended Aluminum Dusts in Corner Space[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(1): 37-45.

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