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Fluid Dynamics

, Volume 53, Issue 1, pp 1–8 | Cite as

Flows of Supersonic Underexpanded Jets on the Range of Moderate Reynolds Numbers

  • V. M. Aniskin
  • A. A. Maslov
  • S. G. Mironov
Article

Abstract

The results of an experimental investigation of the gasdynamic structure of supersonic underexpanded air jets flowing out of a sonic nozzle into a low-pressure medium are presented. This setting of the experimentmakes it possible to achieve high values of the nozzle-to-ambient pressure ratio at moderate outflow Reynolds numbers characteristic of underexpanded jets issuing from micronozzles. The data on the supersonic core length, the laminar-turbulent transition location, and the jet flow characteristics are obtained. The results are compared with those obtained in microjets flowing out of sonic nozzles. Emphasis is placed on the earlier discovered effect of inverse transition of a turbulent jet into the laminar flow regime with increase in the Reynolds number.

Key words

supersonic underexpanded jets modeling of microjets experiments 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • V. M. Aniskin
    • 1
  • A. A. Maslov
    • 1
    • 2
  • S. G. Mironov
    • 1
    • 2
  1. 1.Khristianovich Institute of Theoretical and Applied MechanicsSiberian Branch of Russian Academy of SciencesNovosibirskRussia
  2. 2.Department of PhysicsNovosibirsk State UniversityNovosibirskRussia

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