Numerical Simulations of Gaseous Cellular Detonation Interaction with Bluff-Body Obstacles.

In this study, the interaction between a propagating cellular detonation in stoichiometric 2H2/O2 and 2H2/O2/2Ar mixtures with different bluff bodies is investigated computationally. Numerical simulations are performed based on the two-dimensional reactive Euler equations with detailed chemistry models. A finite-volume package AMROC - an opensource code based on the structured adaptive mesh refinement (SAMR) technique - is used for the computations using both a 2nd order accurate, shock-capturing MUSCL-TVD finite volume method and a first-order accurate Godunov splitting method to handle the reaction source term. Adaptive mesh refinement (AMR) is employed to dynamically increase the resolution of a simulation in regions around shocks and reaction fronts. The present numerical results are compared with the recent experimental measurement. The detonation cell evolution, different regions downstream after the interaction, and the effect of obstacle scale and combustible mixture sensitivity are analyzed and discussed. [ABSTRACT FROM AUTHOR]