Effects of inert dispersed particles on the propagation characteristics of a H2/CO/air detonation wave

In this study, numerical simulations are carried out by utilizing Eulerian-Lagrangian methods to investigate effects of the inert dispersed particles on the propagation characteristics of the H2/CO/air detonation wave. The results show that the inert particles reduce the temperature and velocity of both dispersed and continuous phases. The particles absorb heat from the gas, which alters the spatial location where the chemical equilibrium is achieved upstream of the detonation wave. Increasing the particle mass ratio reduces the detonation wave propagation velocity and hydrodynamic thickness, while it increases the velocity fluctuations at the detonation front. In contrary to this, enlarging the particle diameter leads to the augmentation of the detonation wave propagation velocity and hydrodynamic thickness, while it induces non-monotonic changes in the velocity fluctuations at the detonation front. The results show that the effects of the inert particles on the detonation wave are dominated by the relative scales of the particle relaxation time and the detonation propagation time.