Investigation of lifted flame propagation under pulsing conditions using high-speed OH-LIF and LES

V. N. Prasad, M. Juddoo, A. Kourmatzis*, A. R. Masri

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Flame propagation in a lifted flame subjected to a transient velocity pulse is investigated using high-speed OH-LIF and Large Eddy Simulation (LES). The design of the burner, taking the requirements of the simulations into consideration, comprises an attached and lifted CNG jet flame in a mild air co-flow, forced to transition by a controlled mass flow pulse of fuel. The high-speed images taken at 5 kHz show a rapid lifting of the flames upon pulsation before the flame base propagates back towards the nozzle. The resulting steady state position differed from the initial lift-off position, consistent with the previously observed hysteresis concept. Calculations using LES along with detailed chemistry are shown to capture the basic features observed in the experiment.

Original languageEnglish
Pages (from-to)425-437
Number of pages13
JournalFlow, Turbulence and Combustion
Volume93
Issue number3
DOIs
Publication statusPublished - 27 Sep 2014
Externally publishedYes

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