THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Ivana Stanković

,

Bart Merci

LES-CMS SIMULATIONS OF A TURBULENT LIFTED HYDROGEN FLAME IN VITIATED CO-FLOW

ABSTRACT
Results from a study of turbulent lifted jet flame with Conditional Moment Closure (CMC) turbulent combustion model are reported. First, a qualitative description of the simulation results is given, by examining the instantaneous resolved species mass fraction fields. The structure of the lifted flame is also assessed by comparing the measured temperature and species mass fraction profiles and the simulation results. The model is able to capture the axial and radial profiles of mixture fraction, temperature and major species. The sensitivity of prediction to boundary conditions is also explored and the lift-off height is found to be very sensitive to the co-flow temperature. Finally, the stabilisation mechanisms, auto-ignition or premixed flame propagation, are addressed. No evidence of premixed flame propagation is found: the diffusion in physical space is negligible for all studied conditions.
KEYWORDS
LES, CMC, Lifted flames
PAPER SUBMITTED: 2012-07-04
PAPER REVISED: 2013-03-21
PAPER ACCEPTED: 2013-03-22
PUBLISHED ONLINE: 2013-04-21
DOI REFERENCE: https://doi.org/10.2298/TSCI120704035S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2013, VOLUME 17, ISSUE Issue 3, PAGES [763 - 772]
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LES-CMS simulations of a turbulent lifted hydrogen flame in vitiated co-flow

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