In the present paper, we report on the results of a study of supersonic gas flows in a radial nozzle. The pressurized gas is supplied into a circular channel, from which it then flows into the gap between two parallel disks (radial nozzle). It is shown that the structure of the jet ejected into ambient space substantially depends on the friction force acting on the gas flow from the side of the disks. The force of friction leads to a considerable decrease of the velocity of the supersonic jet,

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... hich acquires a fan-shaped form instead of being barrel-shaped. The numerical results proved to be in good agreement with experimental data.