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The influence of an electric discharge in a supersonic gas flow modeled by a heat source with a specified intensity and configuration on the development of a turbulent boundary layer ahead of a flat step is numerically studied. If the discharge power is sufficiently large, it is demonstrated that heat transfer to the wall does not affect the position of separation, which arises due to a non-zero shear stress on the body surface and is caused by the development of a reverse flow in the core of the boundary layer. [ABSTRACT FROM AUTHOR]

This Letter is devoted to numerical investigation of the effect of the electric discharge on the separation of a turbulent boundary layer before a flat step. Electric discharge is simulated by a heat liberation source of the specified intensity and configuration. It is shown that separation is possible at a sufficiently large discharge power and nonzero bias voltage across the wall. [ABSTRACT FROM AUTHOR]