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Journal of Applied Mechanics and Technical Physics

2017 year, number 6

Supersonic Gas Flows in Radial Nozzles

S. P. Kiselev1,2, V. P. Kiselev1, V. N. Zaikovskii1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
2Novosibirsk State Technical University, Novosibirsk, 630092, Russia
Keywords: радиальное сопло, сверхзвуковое течение, псевдоскачок, пограничный слой, численное моделирование, эксперимент, radial nozzle, supersonic flow, pseudoshock, boundary layer, numerical simulation, experiment


Results of experimental investigations and numerical simulations of supersonic gas flows in radial nozzles with different nozzle widths are presented. It is demonstrated that different types of the flow are formed in the nozzle with a fixed nozzle radius and different nozzle widths: supersonic flows with oblique shock waves inducing boundary layer separation are formed in wide nozzles, and flows with a normal pseudoshock separating the supersonic and subsonic flow domains are formed in narrow nozzles (micronozzles). The pseudoshock structure is studied, and the total pressure loss in the case of the gas flow in a micronozzle is determined.