Jets of a Perfectly Conducting Inviscid Gas in the Presence of a Magnetic Field parallel to the Stream

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Abstract
The two-dimensional and the axially symmetrical jets of a perfectly conducting inviscid gas in the presence of a magnetic field parallel to the stream are investigated on the basis of the linearized theory, when the jets are governed by the supersonic hyperbolic equation. To this approximation, the fundamental equations and the boundary conditions are found to agree in their forms with those in the ordinary gasdynamic case, except for some parameters. Therefore, it is possible to obtain the solutions at once by making suitable substitution of the parameters in the well-known solutions for the gasdynamic case. However, when the surrounding flow is governed by the subsonic hyperbolic equation, the circumstance is somewhat different from the gasdynamic case because disturbances in the surrounding flow propagate along the upstream characteristics. The structure of such a jet in the two-dimensional case is re-examined from the view point of reflection and refraction of a weak plane shock wave incident upon an interface between two streams.

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