Journal
JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT
Volume 7, Issue 4, Pages -Publisher
INST AERONAUTICA & ESPACO-IAE
DOI: 10.5028/jatm.v7i4.527
Keywords
Premixed flames; Combustion; Numerical analysis; Backward facing steps; Turbulent flames
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Numerical modeling of premixed combustion is important for a wide range of machines and systems focusing on compliance with the increasing pollutants reduction requirements. However good industrial numerical combustion models need a practical requiring, in this way, a balance between speed and accuracy. The flamelet models are suitable for this purpose providing a decoupling of the reactive and fluid dynamic problems, and an important model of this family is the b-Xi flame surface wrinkling model. A specially challenging experiment to test this combustion model is the ORACLES test rig whose two independent parallel inlet channels consistently influence the turbulent combustion, injecting fuel and oxydizer at different equivalence ratios. The b-Xi flamelet combustion model is known by the sensibility to numerical schemes and boundary conditions and, based on this, the present study proposes to investigate the coupling with the important SST k-omega turbulence model and achieve good balance among accuracy, boundedness, stability and efficiency using the ORACLES experiment.
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