Abstract
We have visualized first the super-compressibility and associated it phenomena in submerged under-expanded supersonic spiral-twisted gaseous jets during its flowing from the annular nozzle with a central cone. We have observed the regular unusual axial symmetric vortex structures of body rotation and chain structures of jets in argon, helium, nitrogen and air. The type of structure depends on geometry of nozzle and pressure in pre-chamber. Strong density gradient appears discretely in mentioned jets.
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