Specific features of the gas-dynamic structure of supersonic axisymmetric microjets of a nonequilibrium SF6 gas

Vladimir Aniskin, Nikolay Maslov, Sergey Mironov, Elena Tsybulskaya, and Ivan Tsyryulnikov
Phys. Rev. Fluids 5, 083401 – Published 26 August 2020

Abstract

The article explores a physical phenomenon characteristic of the gas dynamics of microflows. Exhaustion of a supersonic jet of a vibrational exited polyatomic gas SF6 from convergent nozzles with diameters ranging from 63 to 1000 μm is considered. The influence of vibrational nonequilibrium of the gas on the gas-dynamic structure of supersonic axisymmetric jets is detected in experiments and is numerically confirmed. This influence is manifested as a decrease in the streamwise size of the wave structure cells and reduction of the number of these cells as compared to the equilibrium supersonic flow. It is demonstrated that the maximum effect is observed in jets escaping from nozzles with diameters about 250 μm.

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  • Received 6 November 2019
  • Accepted 9 April 2020

DOI:https://doi.org/10.1103/PhysRevFluids.5.083401

©2020 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Vladimir Aniskin, Nikolay Maslov, Sergey Mironov*, Elena Tsybulskaya, and Ivan Tsyryulnikov

  • Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia

  • *Corresponding author: mironov@itam.nsc.ru

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Vol. 5, Iss. 8 — August 2020

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