Propagation of heterogeneous detonation in a monodisperse suspension of small aluminum particles in oxygen in a plane channel with abrupt area expansion is investigated numerically. Possible scenarios of the planar or cellular detonation transitions into the wide part of the channel are analyzed. Formation of cellular structure in the wide part of the channel with changing the cell size in the process of propagation is established. In the sustained regimes of propagation the cell size corresponds to the inherent value for a given mixture.
particle gas suspensions, detonation, cellular detonation, duct flows, numerical modeling