Abstract
In this paper we present a mathematical analysis of a supersonic jet stream out of an orifice into the atmosphere. The analysis involves the interaction of steady rarefaction waves, and the interaction of a rarefaction wave by the interface of the jet stream. The existence of the classical solution in the region of interactions of rarefaction waves is established. For small pressure difference the existence of the classical solution in the region of reflection is also obtained. Finally, for large pressure difference vacuum may be produced by strong expanding, and the corresponding wave structure with vacuum is also analyzed.
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