Аннотация:Three-dimensional distributions of velocity, temperature and pressure in the supersonic air flow atM = 2, as well as the current density in the discharge initiated in it, are obtained. A direct current gas dischargeof 10 A is considered in the hydrodynamic approximation within the channel model. The evolution of a transverse-longitudinal discharge is considered in the time range t up to 20 μs. It is shown that the discharge movesalmost at the velocity of the main supersonic air flow disturbing it rather weakly. Based on the characteristicvalues of the current density and gas temperature of 8000–10000 K obtained in the calculations, the electrondensity in the discharge channel is estimated as ne ~ 1016 cm–3. The field strength of E ~ 125 V/cm is estimatedand the reduced field strength in the discharge channel E/N is about 30 Td. In the configuration of an aerodynamic model with shortened electrodes, the transition to the discharge phase fixed at their ends is shown.
