| Abstract: | Detonation combustion of hydrogen-air mixtures entering an axisymmetric convergent-divergent nozzle at a supersonic velocity
is considered. The nozzle geometry does not ensure gas self-ignition; for this reason, forced ignition is used, which, under
certain conditions, leads to the formation of stationary detonation combustion in the case of both uniform and nonuniform
hydrogen distribution at the channel entry. The nonlinear problem of the stability of these combustion regimes against periodic
disturbances of the hydrogen concentration in the oncoming flow is numerically solved. The study is performed on the basis
of the two-dimensional gasdynamic Euler equations for a multicomponent reacting gas. A detailed model of chemical reactions
is used. |
