Abstract

Results of experimental and numerical modeling of supersonic underexpanded jets exhausting into a slotted submerged space formed by two parallel disks are presented. It is demonstrated that the structure of the exhausting off-design jet depends on the distance between the disks. The friction force acting from the disks on the gas is responsible for significant changes in the supersonic jet structure At a certain distance between the disks, there arises a curvilinear shock wave, followed by a subsonic flow region. In this case, the jet boundary acquires a fan-shaped structure rather than a typical barrel-shaped structure.

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