Investigation of turbulent swirling jet-flames by PIV / OH PLIF / HCHO PLIF

A. S. Lobasov, L. M. Chikishev

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

The present paper reports on the investigation of fuel-lean and fuel-rich turbulent combustion in a high-swirl jet. Swirl rate of the flow exceeded a critical value for breakdown of the swirling jet's vortex core and formation of the recirculation zone at the jet axis. The measurements were performed by the stereo PIV, OH PLIF and HCHO PLIF techniques, simultaneously. The Reynolds number based on the flow rate and viscosity of the air was fixed as 5 000 (the bulk velocity was U 0 = 5 m/s). Three cases of the equivalence ratio φ of the mixture issuing from the nozzle-burner were considered, viz., 0.7, 1.4 and 2.5. The latter case corresponded to a lifted flame of fuel-rich swirling jet flow, partially premixed with the surrounding air. In all cases the flame front was subjected to deformations due to large-scale vortices, which rolled-up in the inner (around the central recirculation zone) and outer (between the annular jet core and surrounding air) mixing layers.

Original languageEnglish
Article number012033
Number of pages6
JournalJournal of Physics: Conference Series
Volume980
Issue number1
DOIs
Publication statusPublished - 19 Mar 2018

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