Structure of relaxation zones behind a shock front in chemically active gas mixtures

The shock wave structure in chemically active mixtures which tolerate a number of independent relaxation processes is analyzed under the assumption that the frozen and equilibrium speeds of sound hardly differ from each other, and that the velocity of the oncoming flow is greater than the rate of propagation of small disturbances in a mixture of frozen composition. Under these assumptions, the shock front (at which the relaxation zones are situated) forms the boundary of the unperturbed flow. The influence of an increase in flow velocity at infinity on the structure of the relaxation zones is studied by the method of matching external and internal asymptotic expansions.