Investigation of the Flow Structure on a Miniature Gas-Dynamic Setup: Identification of the Secondary Flow in a Clustered Supersonic Jet Escaping Into a Rarefied Space

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Abstract

A possibility of using small-scale vacuum setups for experimental investigations of supersonic jets escaping from supersonic nozzles into vacuum or rarefied space is considered. Results of studying the structure of the secondary supersonic flow formed in supersonic jets with developed condensation, which is detected for the first time, are reported. The present investigations are carried out with the use of photometry and spectrometry of jets with the use of radiation excited by an electron beam; flow visualization is also performed. The results obtained in the study are analyzed; capabilities and specific features of various methods of flow registration are considered. An empirical model, which establishes the dependence between the detected secondary flow and the process of formation of large clusters in the flow, is developed and justified.

Original languageEnglish
Pages (from-to)809-817
Number of pages9
JournalJournal of Applied Mechanics and Technical Physics
Volume59
Issue number5
DOIs
Publication statusPublished - 1 Sep 2018

Keywords

  • cluster
  • modeling on laboratory setups
  • photometry
  • rarefied gas
  • spectroscopy
  • supersonic jet

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