Abstract
Detonation in suspended aluminum dust is numerically simulated with two-phase flow model. The development and propagation process of detonation in suspended aluminum dust are obtained by numerical simulation with distribution of pressure, density, velocity, temperature in the flow field behind shock waves. Parameters of detonation of aluminum dust with different concentrations are calculated. Lower limit of detonation of aluminum dust is also obtained by calculation. At the same concentration, the nano aluminum dust detonation has higher pressure and faster detonation velocity compared with micro aluminum dust. Detonation of suspended aluminum dust in enclosed channel is numerically simulated. The result of numerical simulation shows distinctly that the shock front caused by initiation, and the combustion front of the aluminum particles caused by the high temperature behind the shock front, and the shock front pursued by burning front in aluminum dust and the formation of the detonation. Then the detonation wave is reflected in the wall, and the pressure and temperature increase greatly near the wall.
