Numerical simulation of the structure of two-dimensional gaseous detonation of an $\mathrm{H}_2$–$\mathrm{O}_2$–$\mathrm{Ar}$

A two-dimensional structure of detonation waves in an $2\mathrm{H}_2$ + $\mathrm{O}_2$ + $X\mathrm{Ar}$ mixture is numerically studied in a wide range of initial pressures and degrees of dilution. Good qualitative agreement of the numerical results with experimental data is obtained. The effect of the method of initiation (by one or several sites, symmetric or asymmetric) on the steady structure of detonation waves is studied. The changes in the wave structure induced by variation of the channel width are examined. It is shown that the behavior of the two-dimensional wave structure is qualitatively different for mixtures with $X=0$ and $X>0$.