Frequency response of the flow in a radial swirler

Research output: Contribution to journalArticlepeer-review

Abstract

We report the results of an experimental study on flow with a precessing vortex core in an isothermal radial swirler burner model. It was shown for the first time that in radial swirler flow, the Strouhal number (the dimensionless precession frequency of the vortex core) is inversely related to the swirl number in the range 0.5 < S < 0.8. A minimum occurs in the precessing vortex core frequency due to the reduced velocity of the helical vortex structure in the axial flow direction and the axial stretching of the helical vortex structure. This finding emphasizes the importance of accounting for the helical geometry of the precessing vortex when predicting the frequency response of burner installations.

Original languageEnglish
Pages (from-to)2397-2402
Number of pages6
JournalJournal of Mechanical Science and Technology
Volume36
Issue number5
DOIs
Publication statusPublished - May 2022

Keywords

  • LDA
  • Microphones
  • Precessing vortex core
  • Swirl flow
  • Swirler

OECD FOS+WOS

  • 2 ENGINEERING AND TECHNOLOGY

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