  Transmission of hydrogen detonation wave (DW) in an inert particle curtain is
simulated using the Eulerian-Lagrangian approach with gas-particle two-way
coupling. A detailed chemical mechanism is used for hydrogen detonative
combustion and parametric studies are conducted based on a two-dimensional
computational domain. A detonation map of propagation and extinction
corresponding to various particle sizes, concentrations, and curtain
thicknesses is plotted. It is shown that the critical curtain thickness
decreases considerably when the particle concentration is less than the
critical value. The effects of curtain thickness on the trajectories of peak
pressure, shock front speed, and heat release rate are examined. Three
propagation modes of the DW in particle curtain are found: detonation
transmission, partial extinction and detonation reinitiation, and detonation
extinction. The chemical explosive mode analysis confirms that a detonation
re-initiation event is caused by a re-initiation point with high pressure and
explosive propensity, resulting from transverse shock focusing. The influence
of particle dimeter and concentration, and curtain thickness on the DW are also
examined with peak pressure trajectories, shock speed, and interphase exchange
rates of energy and momentum. Furthermore, the evolutions of curtain
morphologies are analyzed by the particle velocity, volume fraction, Stokes
drag and Archimedes force. This analysis confirms the importance of the drag
force in influencing the change of curtain morphologies. Different curtain
evolution regimes are found: quasi-stationary regime, shrinkage regime,
constant-thickness regime, and expansion regime. Finally, the influences of the
curtain thickness on the characteristic time of curtain evolutions are studied.
