Investigation of Supersonic Underexpanded Jets Exhausting into a Slotted Submerged Space
S. P. Kiselev, V. P. Kiselev, V. N. Zaikovskii
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: щелевое пространство, плоский канал, сверхзвуковая струя, ударная волна, численное моделирование, разностная схема, эксперимент, slotted space, plane channel, supersonic jet, shock wave, numerical simulation, difference scheme, experiment
Abstract
Results of experimental and numerical modeling of supersonic under expanded 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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