ON THE MECHANISM OF FORMATION OF LONGITUDINAL VORTICES IN A SUPERSONIC JET ISSUING FROM A RADIAL NOZZLE
S. P. Kiselev, V. P. Kiselev, V. N. Zaikovskii, G. V. Trubacheev
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: radial nozzle, supersonic jet, longitudinal vortex, experiment, numerical simulation
Abstract
The mechanism of longitudinal vortex formation in a supersonic jet issuing from an axisymmetric radial nozzle is investigated. Numerical simulations of the gas flow reveal that these vortices arise when gas flows from the prechamber into the inlet channel through a series of holes in a direction perpendicular to the axis of symmetry of the radial nozzle. The resulting vortices are then transported by the gas flow from the inlet channel into the radial nozzle and subsequently into the supersonic jet emanating from the nozzle. The numerical results are in satisfactory agreement with experimental data.
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