Modeling CO and Estimating Combustion Efficiency with Flamelet-Generated Manifolds in Flares

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Title Modeling CO and Estimating Combustion Efficiency with Flamelet-Generated Manifolds in Flares
Creator Jatale, A.
Contributor Sami, M.; Orsino, S.; Smith, P.
Date 2014-09-08
Spatial Coverage Houston, Texas
Subject 2014 AFRC Industrial Combustion Symposium
Description Paper from the AFRC 2014 conference titled Modeling CO and Estimating Combustion Efficiency with Flamelet-Generated Manifolds in Flares by A. Jatale.
Abstract The goal of this study is to use CFD simulations to accurately estimate the combustion efficiency and CO emission for flares. Combustion engineers face serious challenge in accurate prediction of efficiency and pollutant emissions from combustion systems. Flares, is one such technology which carries additional obstacles in measuring the experimental data. A wind tunnel flare setup was simulated using a Flamelet Generated Manifold (FGM) model in ANSYS R15. This model does not make any assumption on flame structure and the realized trajectories are approximated by scalar evaluation similar to laminar flame. Therefore, it can be successfully used to model ignition, slow chemistry, and quenching that are important in estimation of CO and other pollutant concentrations. Also in this model, 1D premixed flamelets are solved in reaction-progress space, giving better estimation for combustion efficiencies. The simulation uses LES turbulent model and were performed on an optimum size mesh. The experimental data from flare tests performed at the CANMET wind tunnel flare facility1, Ottawa, Canada, was used to compare the simulation results. The simulation results not only show a good match with combustion efficiency data, also the prediction of CO concentration is comparable with experimental data. The effect of crosswind velocity on efficiencies can also be observed in the simulation results.
Type Event
Format application/pdf
Rights No copyright issues exist.
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ARK ark:/87278/s6vh8m38
Setname uu_afrc
Date Created 2015-10-28
Date Modified 2015-10-29
ID 14399
Reference URL https://collections.lib.utah.edu/ark:/87278/s6vh8m38